Landon Noll looking up Fremont Peak Observatory 0.8m telescope Leonid 2001 meteor squall count at Fremont Peak

Calc - C-style arbitrary precision calculator

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Useful calc links:

If are interested in algorithms for finding very large primes:

Some of the methods used by the Amdahl 6 to discover (what was at the time of discovery, the largest known non-Mersenne prime): (391581*2^216193-1) are contained in the calc script lucas.cal. This calc script is available as part of calc distribution.

If are interested the product of curious primes:

See the curious calc web page.

Calc is free

The calc program is free. It is distributed under the GNU Lesser General Public License.

Calc is open software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation version 2.1 of the License.

Many people have expressed their thanks the many people who wrote calc, tested calc, contributed code to calc, patched calc, and helped to improve it since it started back in 1984.

We, the authors of calc wrote calc because they wanted to write it, because it was fun writing it, and because we wanted you to use and enjoy it.

If you use and enjoy calc, and you want to show your appreciation for calc, you might consider doing some of the following:

  • Write and contribute some .cal resource files
  • Write and contribute some calc shell scripts
  • Work on one of the calc TODO items (type "help todo")


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© 1994-2013 Landon Curt Noll
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$Revision: 7.5 $ $Date: 2014/10/09 21:00:41 $