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## Curious prime numbers

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It can be argued that every positive integer n has an associated prime curio. The reverse can also be argued. Regardless, there are a number of curious numbers related to primes. We call such numbers ``Prime Curios!''.

Some of the curious numbers below have been submitted and entered into the ``Prime Curios!'' table under the name Noll.

Here are my own set of curious numbers related to primes:

• 3
3*23 - 3 - 23 is prime

3*23 - 3 + 23 is prime

3*23 + 3 - 23 is prime

• 4
4*24 - 4 - 1 is prime

4*24 - 4 + 1 is prime

4*24 - 4 - 24 - 1 is prime

4*24 + 4 - 1 is prime

4*24 + 4 - 24 + 1 is prime

4*24 + 4 + 24 - 1 is prime

• 5
5*25 + 5 + 25 is prime

• 6
6*26 - 1 is prime

6*26 - 6 + 1 is prime

6*26 - 6 - 26 - 1 is prime

6*26 + 6 - 1 is prime

• 7
7*27 - 7 - 27 is prime

7*27 + 7 + 27 is prime

• 8
8*28 - 8 - 1 is prime

8*28 - 8 - 28 - 1 is prime

8*28 + 8 - 28 + 1 is prime

8*28 + 8 + 28 - 1 is prime

• 10
10*210 + 10 - 210 + 1 is prime

10*210 + 10 + 210 - 1 is prime

• 12
12*212 - 12 - 1 is prime

• 13
13*213 + 13 - 213 is prime

• 16
16*216 - 16 - 1 is prime

• 17
17*217 + 17 - 217 is prime

• 18
18*218 - 18 - 218 - 1 is prime

• 19
19*219 + 19 - 219 is prime

19*219 + 19 + 219 is prime

• 20
20*220 - 20 - 220 - 1 is prime

• 21
21*221 + 21 - 221 is prime

• 22
22*222 + 22 - 222 + 1 is prime

• 27
27*227 + 27 + 227 is prime

• 28
28*228 + 28 + 228 - 1 is prime

• 30
30*230 - 1 is prime

30*230 - 30 + 1 is prime

30*230 + 30 - 1 is prime

• 31
31*231 + 31 + 231 is prime

• 32
32*232 - 1 is prime

32*232 - 32 + 1 is prime

• 33
33*233 + 33 + 233 is prime

• 34
34*234 + 34 - 1 is prime

• 37
37*237 + 37 + 237 is prime

• 38
38*238 + 38 + 1 is prime

• 40
40*240 - 40 - 1 is prime

• 42
42*242 - 42 + 1 is prime

• 44
44*244 + 44 + 244 - 1 is prime

• 45
45*245 - 45 - 245 is prime

• 46
46*246 + 46 + 246 - 1 is prime

• 48
48*248 - 48 - 248 - 1 is prime
• 54
The sum of the non-prime divisors of 54 is a Mersenne prime exponent.

The 54th prime is the smallest number that is the sum of three cubes in two ways.

The sum of denoninators of the Bernoulli numbers less than or equal to 54 is prime.

1354 + 54 is prime.

• 56
Sigma(56) equals the first prime of the form 6n - 1 factorial, 5!

256 - 1 - 56 + 1 is prime.

The number of products of distinct primes less than or equal to 11 (the only palindromic prime with an even number of digits) which ar e congruent to -1 mod 11 is 56.

• 57
pi(57) = 24 and 5757 - pi(57) is prime.

57 * 225 - 1 is prime.

57*257 - 57 + 257 is prime

• 58
58*258 + 58 - 258 + 1 is prime

• 62
62*262 - 62 - 262 - 1 is prime

• 64
64*264 + 64 - 264 + 1 is prime

• 75
75*275 - 75 - 275 is prime

• 76
76*276 + 76 - 276 + 1 is prime

• 80
80*280 - 80 - 1 is prime

• 81
81*281 - 81 - 281 is prime

• 87
87*287 - 87 - 287 is prime

• 92
92*292 - 92 - 292 - 1 is prime

92*292 + 92 - 292 + 1 is prime

• 94
94*294 + 94 - 1 is prime

94*294 + 94 - 294 + 1 is prime

• 111
111 * 2111 - 111 - 2111 is prime.

• 112
112*2112 - 112 - 2112 - 1 is prime

112*2112 + 112 - 2112 + 1 is prime

• 113
113*2113 + 113 + 2113 is prime

• 115
115*2115 - 115 - 2115 is prime

• 120
120*2120 - 120 + 1 is prime

120*2120 - 120 - 2120 - 1 is prime

• 122
122*2122 + 122 - 2122 + 1 is prime

• 123
123 * 2123 - 1 is prime.

• 127
22127-1-1 has no prime factors less than 5 * 1050.

• 173
173*2173 + 173 + 2173 is prime

• 179
179*2179 + 179 - 2179 is prime

• 182
182*2182 - 182 - 2182 - 1 is prime

• 210
210*2210 - 210 + 1 is prime

• 212
212*2212 - 212 - 2212 - 1 is prime

• 216
216*2216 + 216 - 1 is prime

• 217
217*2217 + 217 - 2217 is prime

• 218
218*2218 + 218 + 2218 - 1 is prime

• 225
225*2225 - 225 - 2225 is prime

• 232
232*2232 + 232 + 2232 - 1 is prime

• 248
248*2248 - 248 + 1 is prime

• 256
256 = (21701 - 19937) - (23209 - 21701). Note the use of three consecutive Mersenne prime exponents!

• 274
274*2274 + 274 - 2274 + 1 is prime

• 284
284*2284 - 284 + 1 is prime

• 286
repeat(286,8) * 2286 - 1 is prime

repeat(286,22) * 2286 + 286 - 1 is prime

repeat(286,57) * 2286 + 2286 + 1 is prime

repeat(286,114) * 2286 - 2286 - 1 is prime

repeat(286,155) * 2286 + 2286 + 1 is prime

• 287
repeat(287,60) * 2287 + 1 is prime

repeat(287,109) * 2287 + 1 is prime

repeat(287,110) * 2287 - 2287 - 1 is prime

repeat(287,118) * 2287 - 2287 - 1 is prime

• 288
repeat(288,6) + 1 is prime

repeat(288,24) + 1 is prime

repeat(288,34) * 2288 - 1 is prime

repeat(288,48) * 2288 - 1 is prime

repeat(288,68) * 2288 + 288 + 1 is prime

repeat(288,70) + 1 is prime

repeat(288,98) + 1 is prime

repeat(288,149) * 2288 - 288 + 1 is prime

repeat(288,171) + 1 is prime

• 290
repeat(290,1) * 2290 + 2290 - 1 is prime

repeat(290,6) + 1 is prime

repeat(290,30) * 2290 - 290 + 1 is prime

repeat(290,59) * 2290 - 290 - 1 is prime

repeat(290,68) * 2290 + 290 - 1 is prime

repeat(290,73) * 2290 - 290 - 1 is prime

repeat(290,131) * 2290 + 1 is prime

repeat(290,133) * 2290 - 290 - 1 is prime

repeat(290,176) * 2290 - 290 - 1 is prime

repeat(290,180) * 2290 + 1 is prime

• 294
repeat(294,1) * 2294 + 2294 + 1 is prime

repeat(294,7) * 2294 + 1 is prime

repeat(294,11) * 2294 - 294 - 1 is prime

repeat(294,55) * 2294 + 1 is prime

repeat(294,182) * 2294 + 1 is prime

repeat(294,247) * 2294 + 2294 + 1 is prime

• 295
repeat(295,12) * 2295 + 1 is prime

repeat(295,41) * 2295 - 2295 - 1 is prime

repeat(295,117) * 2295 - 2295 + 1 is prime

repeat(295,241) * 2295 - 1 is prime

repeat(295,264) * 2295 + 2295 - 1 is prime

• 296
repeat(296,6) + 1 is prime

repeat(296,22) * 2296 - 296 + 1 is prime

repeat(296,32) * 2296 + 296 - 1 is prime

repeat(296,46) * 2296 - 296 + 1 is prime

repeat(296,50) * 2296 + 296 - 1 is prime

repeat(296,79) * 2296 + 296 + 1 is prime

repeat(296,109) * 2296 + 2296 + 1 is prime

repeat(296,154) * 2296 + 2296 - 1 is prime

repeat(296,190) * 2296 - 2296 + 1 is prime

repeat(296,281) * 2296 + 296 + 1 is prime

• 297
repeat(297,57) * 2297 - 1 is prime

repeat(297,67) * 2297 - 2297 + 1 is prime

• 298
repeat(298,3) * 2298 - 298 - 1 is prime

repeat(298,7) * 2298 + 1 is prime

repeat(298,208) * 2298 + 1 is prime

repeat(298,220) * 2298 - 2298 + 1 is prime

• 300
repeat(300,2) + 1 is prime

repeat(300,3) * 2300 - 2300 - 1 is prime

repeat(300,6) + 1 is prime

repeat(300,13) * 2300 + 2300 + 1 is prime

repeat(300,18) * 2300 + 2300 + 1 is prime

repeat(300,30) + 1 is prime

repeat(300,33) * 2300 - 300 - 1 is prime

repeat(300,42) * 2300 - 1 is prime

repeat(300,46) * 2300 + 1 is prime

repeat(300,51) * 2300 - 300 - 1 is prime

repeat(300,92) * 2300 + 2300 + 1 is prime

repeat(300,128) * 2300 - 1 is prime

repeat(300,143) * 2300 + 300 + 1 is prime

repeat(300,235) * 2300 - 300 + 1 is prime

repeat(300,237) * 2300 + 2300 + 1 is prime

repeat(300,259) * 2300 - 2300 - 1 is prime

• 301
repeat(301,19) * 2301 - 2301 + 1 is prime

repeat(301,24) * 2301 + 1 is prime

repeat(301,24) * 2301 + 2301 - 1 is prime

repeat(301,48) * 2301 + 2301 - 1 is prime

repeat(301,60) * 2301 + 1 is prime

repeat(301,60) * 2301 - 2301 + 1 is prime

repeat(301,82) * 2301 - 1 is prime

repeat(301,102) * 2301 - 2301 + 1 is prime

repeat(301,120) * 2301 - 1 is prime

• 302
repeat(302,6) * 2302 - 1 is prime

repeat(302,42) + 1 is prime

repeat(302,62) + 1 is prime

repeat(302,98) * 2302 + 2302 - 1 is prime

repeat(302,128) * 2302 + 2302 - 1 is prime

repeat(302,131) + 1 is prime

repeat(302,255) * 2302 - 1 is prime

• 303
repeat(303,99) * 2303 - 1 is prime

• 304
repeat(304,3) * 2304 - 304 - 1 is prime

repeat(304,10) * 2304 - 304 + 1 is prime

repeat(304,29) * 2304 - 304 + 1 is prime

repeat(304,36) * 2304 - 304 - 1 is prime

repeat(304,37) * 2304 + 304 - 1 is prime

repeat(304,54) * 2304 + 304 + 1 is prime

repeat(304,59) * 2304 + 304 + 1 is prime

repeat(304,67) * 2304 - 304 - 1 is prime

repeat(304,73) * 2304 - 2304 - 1 is prime

repeat(304,75) * 2304 + 304 + 1 is prime

repeat(304,77) * 2304 - 1 is prime

repeat(304,91) * 2304 + 304 - 1 is prime

repeat(304,134) * 2304 - 2304 + 1 is prime

repeat(304,243) * 2304 - 1 is prime

repeat(304,290) * 2304 - 2304 + 1 is prime

• 306
repeat(306,1) + 1 is prime

repeat(306,4) + 1 is prime

repeat(306,5) + 1 is prime

repeat(306,17) * 2306 + 306 - 1 is prime

repeat(306,32) + 1 is prime

repeat(306,46) * 2306 + 306 - 1 is prime

repeat(306,47) * 2306 - 1 is prime

repeat(306,77) * 2306 - 2306 - 1 is prime

repeat(306,90) * 2306 - 306 - 1 is prime

repeat(306,111) * 2306 - 306 - 1 is prime

repeat(306,129) + 1 is prime

repeat(306,149) + 1 is prime

repeat(306,152) * 2306 + 306 - 1 is prime

repeat(306,161) * 2306 - 1 is prime

repeat(306,175) + 1 is prime

repeat(306,247) * 2306 + 306 - 1 is prime

repeat(306,285) + 1 is prime

• 308
repeat(308,2) + 1 is prime

repeat(308,9) * 2308 + 1 is prime

repeat(308,30) * 2308 + 1 is prime

repeat(308,30) * 2308 - 308 + 1 is prime

repeat(308,45) * 2308 - 1 is prime

repeat(308,48) + 1 is prime

repeat(308,99) * 2308 - 308 + 1 is prime

repeat(308,104) * 2308 + 2308 - 1 is prime

repeat(308,117) * 2308 - 308 + 1 is prime

repeat(308,160) * 2308 + 2308 - 1 is prime

repeat(308,201) * 2308 - 2308 - 1 is prime

• 309
repeat(309,4) * 2309 + 1 is prime

repeat(309,83) * 2309 - 2309 + 1 is prime

repeat(309,141) * 2309 + 1 is prime

repeat(309,178) * 2309 + 1 is prime

• 310
repeat(310,1) + 1 is prime

repeat(310,4) + 1 is prime

repeat(310,8) * 2310 + 310 - 1 is prime

repeat(310,16) * 2310 + 310 - 1 is prime

repeat(310,18) * 2310 + 1 is prime

repeat(310,28) + 1 is prime

repeat(310,36) * 2310 + 310 + 1 is prime

repeat(310,48) * 2310 + 310 + 1 is prime

repeat(310,57) + 1 is prime

repeat(310,61) * 2310 - 310 - 1 is prime

repeat(310,73) + 1 is prime

repeat(310,104) * 2310 - 310 + 1 is prime

repeat(310,132) * 2310 + 1 is prime

repeat(310,141) * 2310 - 310 - 1 is prime

repeat(310,160) * 2310 + 310 - 1 is prime

repeat(310,173) * 2310 - 310 + 1 is prime

repeat(310,182) * 2310 + 310 + 1 is prime

repeat(310,190) * 2310 + 1 is prime

repeat(310,295) * 2310 + 1 is prime

• 312
repeat(312,1) + 1 is prime

repeat(312,2) + 1 is prime

repeat(312,20) * 2312 - 1 is prime

repeat(312,26) + 1 is prime

repeat(312,29) + 1 is prime

repeat(312,51) * 2312 + 1 is prime

repeat(312,89) + 1 is prime

repeat(312,108) * 2312 + 1 is prime

repeat(312,174) * 2312 + 2312 + 1 is prime

repeat(312,198) * 2312 - 312 + 1 is prime

repeat(312,223) * 2312 - 312 + 1 is prime

repeat(312,232) + 1 is prime

repeat(312,241) + 1 is prime

repeat(312,259) * 2312 - 312 + 1 is prime

• 314
314*2314 - 314 - 1 is prime

• 315
repeat(315,15) * 2315 - 1 is prime

repeat(315,18) * 2315 + 1 is prime

• 316
repeat(316,1) + 1 is prime

repeat(316,7) + 1 is prime

repeat(316,7) * 2316 + 316 - 1 is prime

repeat(316,13) + 1 is prime

repeat(316,130) * 2316 - 2316 + 1 is prime

repeat(316,286) * 2316 - 2316 + 1 is prime

repeat(316,290) * 2316 + 2316 + 1 is prime

repeat(316,301) * 2316 - 2316 + 1 is prime

repeat(316,309) + 1 is prime

• 318
318*2318 - 318 - 2318 - 1 is prime

• 321
repeat(321,56) * 2321 + 1 is prime

repeat(321,85) * 2321 - 2321 + 1 is prime

repeat(321,117) * 2321 + 2321 - 1 is prime

repeat(321,205) * 2321 + 2321 - 1 is prime

• 322
repeat(322,37) * 2322 + 322 - 1 is prime

repeat(322,153) * 2322 + 1 is prime

repeat(322,272) * 2322 + 322 - 1 is prime

repeat(322,302) * 2322 + 2322 - 1 is prime

repeat(322,319) * 2322 + 2322 - 1 is prime

• 325
repeat(325,1) * 2325 - 2325 - 1 is prime

repeat(325,96) * 2325 + 2325 - 1 is prime

• 326
repeat(326,7) * 2326 - 1 is prime

repeat(326,16) * 2326 - 326 - 1 is prime

repeat(326,17) + 1 is prime

repeat(326,41) + 1 is prime

repeat(326,43) * 2326 - 326 + 1 is prime

repeat(326,96) + 1 is prime

repeat(326,199) * 2326 - 326 + 1 is prime

repeat(326,231) * 2326 - 2326 - 1 is prime

repeat(326,243) * 2326 - 326 + 1 is prime

repeat(326,248) * 2326 - 2326 + 1 is prime

repeat(326,269) * 2326 - 2326 - 1 is prime

• 327
repeat(327,71) * 2327 + 1 is prime

repeat(327,71) * 2327 + 1 is prime

• 328
repeat(328,4) + 1 is prime

repeat(328,12) + 1 is prime

repeat(328,14) * 2328 - 328 + 1 is prime

repeat(328,36) * 2328 + 1 is prime

repeat(328,40) * 2328 + 1 is prime

repeat(328,45) * 2328 - 328 - 1 is prime

repeat(328,56) * 2328 - 2328 + 1 is prime

repeat(328,59) * 2328 - 1 is prime

repeat(328,104) * 2328 + 2328 - 1 is prime

repeat(328,108) * 2328 - 1 is prime

repeat(328,116) * 2328 + 2328 - 1 is prime

repeat(328,255) * 2328 + 1 is prime

repeat(328,324) * 2328 + 1 is prime

repeat(328,328) * 2328 - 2328 - 1 is prime

• 329
repeat(329,13) * 2329 + 1 is prime

repeat(329,86) * 2329 - 2329 + 1 is prime

repeat(329,90) * 2329 - 2329 + 1 is prime

repeat(329,138) * 2329 - 2329 + 1 is prime

repeat(329,139) * 2329 + 1 is prime

repeat(329,190) * 2329 + 1 is prime

• 330
repeat(330,1) + 1 is prime

repeat(330,2) + 1 is prime

repeat(330,4) * 2330 + 1 is prime

repeat(330,8) + 1 is prime

repeat(330,12) * 2330 - 330 - 1 is prime

repeat(330,14) + 1 is prime

repeat(330,17) + 1 is prime

repeat(330,18) * 2330 - 330 - 1 is prime

repeat(330,28) * 2330 - 330 - 1 is prime

repeat(330,30) * 2330 + 1 is prime

repeat(330,46) + 1 is prime

repeat(330,48) * 2330 - 330 - 1 is prime

repeat(330,110) * 2330 - 1 is prime

repeat(330,133) * 2330 - 330 + 1 is prime

repeat(330,140) * 2330 + 1 is prime

repeat(330,162) * 2330 + 330 + 1 is prime

repeat(330,179) * 2330 - 330 - 1 is prime

repeat(330,207) + 1 is prime

• 332
repeat(332,3) + 1 is prime

repeat(332,8) + 1 is prime

repeat(332,9) * 2332 + 2332 + 1 is prime

repeat(332,18) * 2332 + 2332 + 1 is prime

repeat(332,62) * 2332 + 1 is prime

repeat(332,68) + 1 is prime

repeat(332,106) * 2332 - 2332 + 1 is prime

repeat(332,141) * 2332 - 1 is prime

repeat(332,153) * 2332 + 2332 + 1 is prime

repeat(332,220) * 2332 - 332 - 1 is prime

repeat(332,273) * 2332 + 1 is prime

repeat(332,300) * 2332 - 1 is prime

• 334
334*2334 + 334 + 2334 - 1 is prime

• 335
repeat(335,3) * 2335 + 2335 - 1 is prime

repeat(335,61) * 2335 + 1 is prime

repeat(335,160) * 2335 + 1 is prime

repeat(335,216) * 2335 - 2335 + 1 is prime

• 336
repeat(336,1) + 1 is prime

repeat(336,2) * 2336 + 336 + 1 is prime

repeat(336,4) + 1 is prime

repeat(336,7) + 1 is prime

repeat(336,13) * 2336 - 336 - 1 is prime

repeat(336,19) + 1 is prime

repeat(336,21) + 1 is prime

repeat(336,24) + 1 is prime

repeat(336,34) + 1 is prime

repeat(336,36) * 2336 + 2336 + 1 is prime

repeat(336,46) * 2336 + 336 - 1 is prime

repeat(336,65) + 1 is prime

repeat(336,94) + 1 is prime

repeat(336,210) * 2336 + 336 + 1 is prime

repeat(336,232) * 2336 - 336 + 1 is prime

repeat(336,316) * 2336 + 2336 + 1 is prime

repeat(336,325) * 2336 - 336 - 1 is prime

• 339
repeat(339,12) * 2339 - 1 is prime

repeat(339,92) * 2339 + 1 is prime

repeat(339,201) * 2339 - 1 is prime

repeat(339,281) * 2339 - 1 is prime

repeat(339,339) * 2339 - 1 is prime

• 342
repeat(342,2) + 1 is prime

repeat(342,28) + 1 is prime

repeat(342,32) * 2342 + 1 is prime

repeat(342,35) * 2342 + 2342 + 1 is prime

repeat(342,38) + 1 is prime

repeat(342,41) * 2342 - 2342 - 1 is prime

repeat(342,42) * 2342 - 1 is prime

repeat(342,70) * 2342 - 1 is prime

repeat(342,83) * 2342 - 1 is prime

repeat(342,103) * 2342 - 1 is prime

repeat(342,151) * 2342 + 342 + 1 is prime

repeat(342,168) * 2342 + 1 is prime

repeat(342,195) * 2342 + 2342 + 1 is prime

repeat(342,203) * 2342 - 2342 - 1 is prime

repeat(342,288) * 2342 + 1 is prime

• 345
345*2345 - 345 - 2345 is prime

• 346
repeat(346,1) + 1 is prime

repeat(346,12) + 1 is prime

repeat(346,43) * 2346 - 2346 - 1 is prime

repeat(346,50) * 2346 - 1 is prime

repeat(346,52) * 2346 - 2346 + 1 is prime

repeat(346,53) * 2346 + 346 + 1 is prime

repeat(346,57) * 2346 - 346 - 1 is prime

repeat(346,78) * 2346 + 346 + 1 is prime

repeat(346,129) + 1 is prime

repeat(346,141) * 2346 - 2346 - 1 is prime

repeat(346,143) * 2346 - 346 + 1 is prime

repeat(346,148) * 2346 - 2346 + 1 is prime

repeat(346,170) * 2346 - 1 is prime

repeat(346,223) + 1 is prime

repeat(346,230) * 2346 + 346 + 1 is prime

repeat(346,238) * 2346 - 346 + 1 is prime

repeat(346,240) * 2346 - 346 - 1 is prime

repeat(346,287) * 2346 + 346 - 1 is prime

• 348
repeat(348,1) + 1 is prime

repeat(348,10) * 2348 - 1 is prime

repeat(348,18) * 2348 - 348 - 1 is prime

repeat(348,31) * 2348 - 1 is prime

repeat(348,59) * 2348 - 2348 - 1 is prime

repeat(348,137) * 2348 - 1 is prime

repeat(348,189) + 1 is prime

repeat(348,254) * 2348 - 348 + 1 is prime

repeat(348,330) * 2348 - 348 - 1 is prime

• 349
repeat(349,1) is prime

repeat(349,9) * 2349 - 1 is prime

repeat(349,21) * 2349 - 2349 + 1 is prime

repeat(349,58) * 2349 - 1 is prime

repeat(349,60) * 2349 + 1 is prime

repeat(349,88) * 2349 - 2349 + 1 is prime

repeat(349,111) * 2349 - 1 is prime

repeat(349,286) * 2349 - 1 is prime

• 350
repeat(350,2) + 1 is prime

repeat(350,16) * 2350 - 350 + 1 is prime

repeat(350,32) * 2350 + 1 is prime

repeat(350,38) * 2350 + 1 is prime

repeat(350,73) * 2350 - 1 is prime

repeat(350,78) * 2350 - 1 is prime

repeat(350,160) * 2350 - 350 + 1 is prime

repeat(350,166) * 2350 - 1 is prime

repeat(350,265) * 2350 - 350 - 1 is prime

repeat(350,291) * 2350 + 350 - 1 is prime

• 351
repeat(351,10) * 2351 + 1 is prime

repeat(351,204) * 2351 + 1 is prime

repeat(351,326) * 2351 + 1 is prime

• 352
repeat(352,1) + 1 is prime

repeat(352,2) * 2352 + 2352 + 1 is prime

repeat(352,4) * 2352 + 2352 - 1 is prime

repeat(352,5) * 2352 - 2352 + 1 is prime

repeat(352,5) * 2352 + 2352 - 1 is prime

repeat(352,7) + 1 is prime

repeat(352,39) + 1 is prime

repeat(352,114) + 1 is prime

repeat(352,173) * 2352 - 2352 + 1 is prime

repeat(352,242) * 2352 - 1 is prime

repeat(352,264) * 2352 + 2352 + 1 is prime

repeat(352,316) * 2352 - 2352 + 1 is prime

repeat(352,336) * 2352 + 1 is prime

• 354
repeat(354,14) * 2354 - 354 - 1 is prime

repeat(354,18) * 2354 + 1 is prime

repeat(354,35) * 2354 - 2354 - 1 is prime

repeat(354,42) * 2354 + 1 is prime

repeat(354,46) * 2354 + 1 is prime

repeat(354,65) * 2354 + 354 + 1 is prime

repeat(354,109) * 2354 - 354 + 1 is prime

repeat(354,117) * 2354 - 2354 - 1 is prime

repeat(354,122) * 2354 + 1 is prime

repeat(354,139) * 2354 + 2354 + 1 is prime

repeat(354,144) * 2354 + 354 + 1 is prime

repeat(354,220) * 2354 - 354 + 1 is prime

repeat(354,289) * 2354 + 354 + 1 is prime

• 356
repeat(356,18) + 1 is prime

repeat(356,20) + 1 is prime

repeat(356,35) * 2356 - 2356 - 1 is prime

repeat(356,42) * 2356 + 2356 + 1 is prime

repeat(356,129) * 2356 - 2356 - 1 is prime

repeat(356,178) * 2356 + 2356 + 1 is prime

repeat(356,218) * 2356 - 2356 + 1 is prime

repeat(356,280) * 2356 + 2356 + 1 is prime

repeat(356,323) * 2356 + 356 + 1 is prime

repeat(356,348) * 2356 + 1 is prime

• 357
repeat(357,8) * 2357 - 1 is prime

repeat(357,26) * 2357 - 1 is prime

repeat(357,35) * 2357 - 1 is prime

repeat(357,105) * 2357 - 1 is prime

repeat(357,197) * 2357 - 1 is prime

repeat(357,232) * 2357 - 1 is prime

• 358
repeat(358,1) + 1 is prime

repeat(358,12) + 1 is prime

repeat(358,19) * 2358 + 1 is prime

repeat(358,34) * 2358 - 2358 + 1 is prime

repeat(358,58) * 2358 - 2358 + 1 is prime

repeat(358,96) * 2358 + 358 + 1 is prime

repeat(358,112) * 2358 + 1 is prime

repeat(358,155) * 2358 - 2358 + 1 is prime

repeat(358,303) + 1 is prime

• 360
repeat(360,3) + 1 is prime

repeat(360,4) * 2360 + 360 - 1 is prime

repeat(360,6) + 1 is prime

repeat(360,7) * 2360 - 360 + 1 is prime

repeat(360,11) + 1 is prime

repeat(360,17) + 1 is prime

repeat(360,28) * 2360 + 360 + 1 is prime

repeat(360,44) + 1 is prime

repeat(360,48) * 2360 + 1 is prime

repeat(360,76) + 1 is prime

repeat(360,87) * 2360 - 360 - 1 is prime

repeat(360,99) * 2360 - 2360 - 1 is prime

repeat(360,136) * 2360 - 2360 - 1 is prime

repeat(360,146) * 2360 + 1 is prime

repeat(360,152) * 2360 - 360 - 1 is prime

repeat(360,154) * 2360 - 2360 - 1 is prime

repeat(360,185) * 2360 - 1 is prime

repeat(360,194) * 2360 + 360 + 1 is prime

repeat(360,274) * 2360 + 1 is prime

repeat(360,297) + 1 is prime

repeat(360,360) * 2360 + 360 - 1 is prime

• 361
repeat(361,12) * 2361 - 2361 + 1 is prime

repeat(361,63) * 2361 + 1 is prime

repeat(361,66) * 2361 + 1 is prime

• 362
362*2362 - 1 is prime

• 364
repeat(364,16) * 2364 - 2364 + 1 is prime

repeat(364,29) * 2364 - 364 + 1 is prime

repeat(364,37) * 2364 - 2364 - 1 is prime

repeat(364,114) * 2364 + 364 + 1 is prime

repeat(364,145) * 2364 - 364 - 1 is prime

repeat(364,271) * 2364 - 364 + 1 is prime

repeat(364,350) * 2364 + 364 + 1 is prime

• 365
repeat(365,42) * 2365 + 2365 - 1 is prime

repeat(365,246) * 2365 - 1 is prime

• 366
repeat(366,1) + 1 is prime

repeat(366,7) + 1 is prime

repeat(366,7) * 2366 - 366 - 1 is prime

repeat(366,8) * 2366 - 366 - 1 is prime

repeat(366,11) + 1 is prime

repeat(366,11) * 2366 + 2366 + 1 is prime

repeat(366,17) + 1 is prime

repeat(366,18) * 2366 - 1 is prime

repeat(366,32) + 1 is prime

repeat(366,33) + 1 is prime

repeat(366,35) * 2366 + 366 + 1 is prime

repeat(366,37) + 1 is prime

repeat(366,46) * 2366 - 1 is prime

repeat(366,50) * 2366 - 366 + 1 is prime

repeat(366,55) * 2366 + 2366 + 1 is prime

repeat(366,109) + 1 is prime

repeat(366,116) * 2366 - 366 + 1 is prime

repeat(366,139) * 2366 + 366 - 1 is prime

repeat(366,195) * 2366 - 1 is prime

repeat(366,281) * 2366 - 366 - 1 is prime

repeat(366,297) + 1 is prime

repeat(366,320) * 2366 - 366 - 1 is prime

• 365
repeat(365,42) * 2365 + 2365 - 1 is prime

repeat(365,246) * 2365 - 1 is prime

• 366
repeat(366,1) + 1 is prime

repeat(366,7) + 1 is prime

repeat(366,7) * 2366 - 366 - 1 is prime

repeat(366,8) * 2366 - 366 - 1 is prime

repeat(366,11) + 1 is prime

repeat(366,11) * 2366 + 2366 + 1 is prime

repeat(366,17) + 1 is prime

repeat(366,18) * 2366 - 1 is prime

repeat(366,32) + 1 is prime

repeat(366,33) + 1 is prime

repeat(366,35) * 2366 + 366 + 1 is prime

repeat(366,37) + 1 is prime

repeat(366,46) * 2366 - 1 is prime

repeat(366,50) * 2366 - 366 + 1 is prime

repeat(366,55) * 2366 + 2366 + 1 is prime

repeat(366,109) + 1 is prime

repeat(366,116) * 2366 - 366 + 1 is prime

repeat(366,139) * 2366 + 366 - 1 is prime

repeat(366,195) * 2366 - 1 is prime

repeat(366,281) * 2366 - 366 - 1 is prime

repeat(366,297) + 1 is prime

repeat(366,320) * 2366 - 366 - 1 is prime

• 367
repeat(367,1) is prime

repeat(367,6) * 2367 + 1 is prime

repeat(367,10) * 2367 - 2367 - 1 is prime

repeat(367,244) * 2367 - 2367 - 1 is prime

repeat(367,284) * 2367 + 1 is prime

• 368
repeat(368,2) + 1 is prime

repeat(368,3) + 1 is prime

repeat(368,5) + 1 is prime

repeat(368,11) * 2368 - 368 - 1 is prime

repeat(368,14) * 2368 - 2368 + 1 is prime

repeat(368,15) + 1 is prime

repeat(368,19) * 2368 - 368 - 1 is prime

repeat(368,24) + 1 is prime

repeat(368,42) + 1 is prime

repeat(368,49) * 2368 + 2368 - 1 is prime

repeat(368,121) * 2368 - 1 is prime

repeat(368,137) + 1 is prime

repeat(368,172) * 2368 - 1 is prime

repeat(368,284) * 2368 + 1 is prime

repeat(368,344) * 2368 + 368 + 1 is prime

repeat(368,344) * 2368 - 2368 + 1 is prime

• 369
repeat(369,13) * 2369 - 1 is prime

repeat(369,21) * 2369 - 1 is prime

repeat(369,56) * 2369 - 1 is prime

repeat(369,115) * 2369 + 2369 - 1 is prime

repeat(369,362) * 2369 - 1 is prime

• 370
repeat(370,4) + 1 is prime

repeat(370,82) + 1 is prime

• 372
repeat(372,1) + 1 is prime

repeat(372,6) + 1 is prime

repeat(372,9) * 2372 - 372 + 1 is prime

repeat(372,18) * 2372 + 1 is prime

repeat(372,20) * 2372 - 372 - 1 is prime

repeat(372,67) * 2372 + 1 is prime

repeat(372,100) + 1 is prime

repeat(372,126) * 2372 - 1 is prime

repeat(372,137) * 2372 - 372 + 1 is prime

repeat(372,148) * 2372 - 1 is prime

repeat(372,340) + 1 is prime

• 374
repeat(374,8) * 2374 + 374 + 1 is prime

repeat(374,14) * 2374 - 374 - 1 is prime

repeat(374,18) * 2374 + 2374 + 1 is prime

repeat(374,25) * 2374 - 374 - 1 is prime

repeat(374,37) * 2374 - 374 + 1 is prime

repeat(374,37) * 2374 + 2374 - 1 is prime

repeat(374,47) * 2374 + 1 is prime

repeat(374,47) * 2374 - 2374 + 1 is prime

repeat(374,62) * 2374 + 1 is prime

repeat(374,82) * 2374 - 374 - 1 is prime

repeat(374,107) * 2374 + 1 is prime

repeat(374,137) * 2374 - 2374 + 1 is prime

repeat(374,177) * 2374 - 374 + 1 is prime

repeat(374,205) * 2374 - 374 + 1 is prime

repeat(374,283) * 2374 - 374 - 1 is prime

repeat(374,340) * 2374 - 374 + 1 is prime

• 385
repeat(385,75) * 2385 + 1 is prime

repeat(385,96) * 2385 - 1 is prime

repeat(385,228) * 2385 - 2385 + 1 is prime

• 377
repeat(377,9) * 2377 - 1 is prime

repeat(377,95) * 2377 - 1 is prime

repeat(377,182) * 2377 - 1 is prime

repeat(377,273) * 2377 - 1 is prime

• 378
repeat(378,1) + 1 is prime

repeat(378,2) + 1 is prime

repeat(378,2) * 2378 + 1 is prime

repeat(378,3) + 1 is prime

repeat(378,6) + 1 is prime

repeat(378,9) + 1 is prime

repeat(378,13) + 1 is prime

repeat(378,22) * 2378 - 1 is prime

repeat(378,25) + 1 is prime

repeat(378,33) * 2378 + 2378 + 1 is prime

repeat(378,53) * 2378 + 2378 + 1 is prime

repeat(378,55) + 1 is prime

repeat(378,64) + 1 is prime

repeat(378,70) * 2378 - 378 - 1 is prime

repeat(378,87) * 2378 + 378 + 1 is prime

repeat(378,114) * 2378 - 1 is prime

repeat(378,203) * 2378 + 2378 + 1 is prime

repeat(378,246) * 2378 - 378 - 1 is prime

repeat(378,273) * 2378 - 378 - 1 is prime

repeat(378,330) * 2378 - 378 - 1 is prime

• 380
repeat(380,8) + 1 is prime

repeat(380,35) * 2380 + 380 + 1 is prime

repeat(380,38) + 1 is prime

repeat(380,62) * 2380 - 380 - 1 is prime

repeat(380,66) * 2380 - 1 is prime

repeat(380,72) + 1 is prime

repeat(380,245) * 2380 - 2380 - 1 is prime

repeat(380,323) * 2380 + 1 is prime

• 381
repeat(381,19) * 2381 + 2381 - 1 is prime

repeat(381,29) * 2381 + 1 is prime

repeat(381,30) * 2381 + 1 is prime

repeat(381,31) * 2381 + 2381 - 1 is prime

• 382
repeat(382,1) + 1 is prime

repeat(382,26) * 2382 - 1 is prime

repeat(382,39) + 1 is prime

repeat(382,54) * 2382 - 2382 - 1 is prime

repeat(382,74) * 2382 + 382 - 1 is prime

repeat(382,100) * 2382 + 382 - 1 is prime

repeat(382,101) * 2382 + 2382 - 1 is prime

repeat(382,103) * 2382 - 382 + 1 is prime

repeat(382,108) * 2382 + 2382 + 1 is prime

repeat(382,126) * 2382 - 2382 - 1 is prime

repeat(382,170) * 2382 - 382 + 1 is prime

repeat(382,202) * 2382 - 2382 - 1 is prime

repeat(382,246) + 1 is prime

repeat(382,301) * 2382 + 382 - 1 is prime

• 384
repeat(384,1) * 2384 - 1 is prime

384*2384 - 1 is prime

repeat(384,22) * 2384 - 384 + 1 is prime

repeat(384,27) * 2384 - 384 + 1 is prime

repeat(384,47) * 2384 - 1 is prime

repeat(384,79) * 2384 + 2384 + 1 is prime

repeat(384,82) * 2384 - 384 + 1 is prime

repeat(384,87) * 2384 + 384 + 1 is prime

repeat(384,177) * 2384 - 1 is prime

repeat(384,198) * 2384 + 2384 + 1 is prime

repeat(384,215) * 2384 - 1 is prime

repeat(384,367) * 2384 + 384 + 1 is prime

• 385
repeat(385,75) * 2385 + 1 is prime

repeat(385,96) * 2385 - 1 is prime

repeat(385,228) * 2385 - 2385 + 1 is prime

• 386
repeat(386,11) + 1 is prime

repeat(386,13) * 2386 - 386 + 1 is prime

repeat(386,20) + 1 is prime

repeat(386,21) + 1 is prime

repeat(386,28) * 2386 - 2386 + 1 is prime

repeat(386,41) + 1 is prime

repeat(386,48) * 2386 - 1 is prime

repeat(386,55) * 2386 + 2386 + 1 is prime

repeat(386,63) * 2386 + 386 - 1 is prime

repeat(386,137) * 2386 - 2386 - 1 is prime

repeat(386,215) * 2386 - 2386 - 1 is prime

repeat(386,231) * 2386 + 386 - 1 is prime

repeat(386,295) * 2386 - 2386 + 1 is prime

repeat(386,320) * 2386 + 386 + 1 is prime

• 387
repeat(387,13) * 2387 + 1 is prime

repeat(387,61) * 2387 - 2387 + 1 is prime

repeat(387,99) * 2387 + 2387 - 1 is prime

repeat(387,234) * 2387 + 1 is prime

repeat(387,339) * 2387 - 2387 + 1 is prime

• 388
repeat(388,1) + 1 is prime

repeat(388,12) * 2388 - 2388 - 1 is prime

repeat(388,18) * 2388 + 388 + 1 is prime

repeat(388,33) + 1 is prime

repeat(388,37) * 2388 - 2388 - 1 is prime

repeat(388,40) + 1 is prime

repeat(388,53) * 2388 - 2388 + 1 is prime

repeat(388,61) * 2388 - 388 + 1 is prime

repeat(388,102) * 2388 + 388 + 1 is prime

repeat(388,103) * 2388 - 388 - 1 is prime

repeat(388,207) * 2388 - 388 - 1 is prime

repeat(388,224) * 2388 + 388 + 1 is prime

repeat(388,236) * 2388 - 2388 + 1 is prime

repeat(388,273) * 2388 - 1 is prime

repeat(388,281) * 2388 - 2388 + 1 is prime

• 389
repeat(389,1) is prime

repeat(389,24) * 2389 + 2389 - 1 is prime

repeat(389,60) * 2389 + 2389 - 1 is prime

repeat(389,136) * 2389 + 2389 - 1 is prime

repeat(389,340) * 2389 + 2389 - 1 is prime

• 390
repeat(390,2) + 1 is prime

repeat(390,6) * 2390 + 1 is prime

repeat(390,14) + 1 is prime

repeat(390,20) * 2390 + 390 + 1 is prime

repeat(390,24) * 2390 - 390 + 1 is prime

repeat(390,34) * 2390 + 1 is prime

repeat(390,111) * 2390 - 390 - 1 is prime

repeat(390,144) * 2390 + 390 - 1 is prime

repeat(390,171) * 2390 - 1 is prime

repeat(390,231) + 1 is prime

repeat(390,231) * 2390 + 390 - 1 is prime

repeat(390,280) + 1 is prime

repeat(390,338) * 2390 - 390 - 1 is prime

repeat(390,375) * 2390 - 390 + 1 is prime

• 391
repeat(391,16) * 2391 + 2391 + 1 is prime

repeat(391,50) * 2391 - 2391 - 1 is prime

repeat(391,204) * 2391 - 1 is prime

repeat(391,364) * 2391 - 1 is prime

• 392
repeat(392,21) + 1 is prime

repeat(392,27) + 1 is prime

repeat(392,46) * 2392 - 1 is prime

repeat(392,99) + 1 is prime

repeat(392,107) * 2392 + 392 - 1 is prime

repeat(392,166) * 2392 - 1 is prime

• 393
repeat(393,118) * 2393 + 1 is prime

repeat(393,155) * 2393 + 1 is prime

repeat(393,354) * 2393 + 1 is prime

• 394
repeat(394,2) * 2394 + 2394 - 1 is prime

repeat(394,12) * 2394 + 394 + 1 is prime

repeat(394,25) * 2394 + 394 - 1 is prime

repeat(394,74) * 2394 - 394 + 1 is prime

repeat(394,264) * 2394 - 394 - 1 is prime

repeat(394,369) * 2394 - 2394 - 1 is prime

repeat(394,371) * 2394 + 394 - 1 is prime

• 395
repeat(395,18) * 2395 - 2395 + 1 is prime

repeat(395,35) * 2395 + 2395 + 1 is prime

repeat(395,138) * 2395 - 2395 + 1 is prime

repeat(395,318) * 2395 - 2395 + 1 is prime

• 396
396*2396 - 396 - 2396 - 1 is prime

• 397
repeat(397,1) is prime

repeat(397,54) * 2397 - 1 is prime

• 398
repeat(398,9) * 2398 + 2398 + 1 is prime

repeat(398,120) * 2398 + 1 is prime

repeat(398,139) * 2398 - 1 is prime

repeat(398,153) * 2398 + 2398 + 1 is prime

repeat(398,159) * 2398 - 2398 - 1 is prime

repeat(398,191) * 2398 + 398 + 1 is prime

repeat(398,222) * 2398 + 1 is prime

repeat(398,273) * 2398 + 2398 + 1 is prime

• 412
412*2412 + 412 + 2412 - 1 is prime

• 423
423*2423 - 423 + 2423 is prime

• 426
426*2426 + 426 + 1 is prime

• 439
439*2439 + 439 + 2439 is prime

• 462
462*2462 - 1 is prime

• 478
478*2478 - 478 - 1 is prime

• 483
483*2483 + 483 - 2483 is prime

• 500
500*2500 - 500 - 2500 - 1 is prime

• 512
512*2512 - 1 is prime

• 563
563*2563 + 563 - 2563 is prime

• 565
565*2565 + 565 + 2565 is prime

• 574
574*2574 - 574 + 1 is prime

• 600
600*2600 - 600 + 1 is prime

• 604
604*2604 - 604 - 1 is prime

• 621
621*2621 - 621 - 2621 is prime

• 628
628*2628 - 628 + 1 is prime

• 634
634*2634 - 634 - 1 is prime

• 705
705*2705 - 705 - 2705 is prime

• 749
749*2749 + 749 + 2749 is prime

• 790
790*2790 - 790 - 1 is prime

• 822
822*2822 - 1 is prime

• 844
844*2844 - 844 - 2844 - 1 is prime

• 868
868*2868 - 868 - 1 is prime

• 902
902*2902 + 902 + 2902 - 1 is prime

• 987
978*2978 + 978 + 1 is prime

• 1015
1015*21015 + 1015 - 21015 is prime

• 1106
1106*21106 + 1106 + 21106 - 1 is prime

• 1120
1120*21120 + 1120 - 1 is prime

• 1264
1264*21264 - 1264 - 1 is prime

• 1364
1364*21364 + 1364 + 21364 - 1 is prime

• 1376
1376*21376 - 1376 - 1 is prime

• 1438
1438*21438 + 1438 - 1 is prime

• 1530
1530*21530 + 1530 + 1 is prime

• 1600
1600*21600 - 1600 + 1 is prime

• 1613
16132 = 867253 + 867257 + 867259 (3 consecutive primes) = 25247 + 25253 + ... + 26251 + 26261 (101 consecutive primes)

1613 is a prime such that the previous two primes AND the next two primes are twin primes

There are 1613 prime sextuplets (p, p+4, p+6, p+10, p+12, p+16 all prime) < 1010

1613 is the 17th prime in the prime sequence f(n)=4*n2 - 4*n + 653
Note that f(0), f(1), ... , f(16), f(17), f(18) are all primes, while f(19) is not.
(760*101613 - 31)/9 = 8 repeat(4,1613) 1 is prime
Note the 1613 consecutive 4 preceded by an 8 and followed by a 1
given p2=1613 and the previous prime p1=1609 it is curious that p12 + p23 ± 1 is a twin prime pair

821613 - 811613 is prime

1613 is the smallest 4 digit prime that starts a run of 6 consecutive primes where between primes exactly one digit changes and where the resulting digits may be permuted
I.e., 1613, 1619, 1621, 1627, 1637, 1657
1613 is the largest prime factor of 226+1

π(1613) = 28-1

π(1613) + 2*1619 is a perfect square of a prime
I.e., 592
• 1630
1630*21630 + 1630 - 21630 + 1 is prime

• 1637
1637*21637 + 1637 + 21637 is prime

• 2161
2161*22161 + 2161 - 22161 is prime

• 2192
2192*22192 + 2192 - 22192 + 1 is prime

• 2339
2339*22339 + 2339 - 22339 is prime

• 2536
2536*22536 - 2536 - 1 is prime

• 2800
2800*22800 - 2800 + 1 is prime

• 2812
2812*22812 + 2812 + 22812 - 1 is prime

• 2957
2957*22957 - 2957 + 22957 is prime

• 2974
2974*22974 + 2974 + 22974 - 1 is prime

• 3236
3236*23236 + 3236 + 23236 - 1 is prime

• 3370
3370*23370 + 3370 - 1 is prime

• 3396
3396*23396 - 3396 + 1 is prime

• 3544
3544*23544 - 3544 - 1 is prime

• 3696
3696*23696 - 3696 - 23696 - 1 is prime

• 3913
3913*23913 + 3913 + 23913 is prime

• 4736
4736*24736 + 4736 + 24736 - 1 is prime

• 4822
4822*24822 + 4822 + 24822 - 1 is prime

• 4885
4885*24885 - 4885 - 24885 is prime

• 5052
5052*25052 - 5052 - 25052 - 1 is prime

• 5062
5062*25062 + 5062 - 1 is prime

• 5066
5066*25066 + 5066 - 25066 + 1 is prime

• 5125
5125*25125 - 5125 - 25125 is prime

• 5268
5268*25268 + 5268 + 1 is prime

• 5312
5312*25312 - 1 is prime

• 5328
5328*25328 - 5328 - 25328 - 1 is prime

• 6300
6300*26300 - 6300 - 26300 - 1 is prime

• 6322
6322*26322 + 6322 - 26322 + 1 is prime

• 6564
6564*26564 - 6564 - 1 is prime

• 6607
6607*26607 - 6607 - 26607 is prime

• 6714
6714*26714 + 6714 - 1 is prime

• 6790
6790*26790 + 6790 + 26790 - 1 is prime

• 6956
6956*26956 + 6956 - 26956 + 1 is prime

• 7238
7238*27238 + 7238 + 1 is prime

• 7268
7268*27268 - 7268 - 1 is prime

• 7328
7328*27328 + 7328 + 27328 - 1 is prime

• 7726
7726*27726 + 7726 + 27726 - 1 is prime

• 7780
7780*27780 - 7780 - 1 is prime

• 7989
7989*27989 - 7989 + 27989 is prime

• 8366
8366*28366 - 8366 - 1 is prime

• 8384
8384*28384 + 8384 + 1 is prime

• 8892
8892*28892 - 8892 + 1 is prime

• 9426
9426*29426 - 9426 + 1 is prime

• 9436
9436*29436 + 9436 - 1 is prime

• 9542
9542*29542 + 9542 + 29542 - 1 is prime

• 9605
9605*29605 + 9605 + 29605 is prime

• 9696
9696*29696 + 9696 + 1 is prime

• (37*102883-73)/99
repeat(37,1441) * 10 + 3 is prime (see the 37 SUPP prime)

repeat(v, n) = v{repeated n times}

For example:

repeat(309,4) = 309309309309

If can be shown that:

repeat(v, n) = v * (10(d*n)-1)/(10d-1)

where ''v'' is ''d'' digits in length.

You can use the calc program to compute the decimal values of the above curious numbers.

The following calc function may be used for the repeat(v, n) function:

```/*
* repeat - depeat a set of digits
*
* given:
*      v  digit set to repeat
*      n   repeat count
*/
define repeat(v,n)
{
local digcnt;

digcnt = digits(v);

return v * (10^(digcnt*n)-1) / (10^digcnt-1);
}
```

#### Source code

• Calc: able to compute decimal values primes
• Number: able to compute English names of primes
• GIMPS code: has been used to prove primality of some Mersenne numbers
• GIMPS search credits and thank yous