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Large Number Arithmetic in BASIC - http://largeint.sourceforge.net/
Library for large-integer arithmetic, plus some number theory modules. |
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http://www.numbertheory.org/gnubc/gnubc.html - http://www.numbertheory.org/gnubc/gnubc.html
Supports arbitrary precision integer arithmetic calculations with interactive execution: it is a superior version of the basic bc program which comes with the UNIX operating system. Keith Matthews has written several number-theoretic programs. |
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Factorizer - http://www.hermetic.ch/factors/factors.htm
A Windows program to find all factors of any positive integer less than 2^31 - 1; decompose numbers into their prime constituents; find prime numbersand pairs of primes; and to plot Erdos-Kac and Palmen Color histograms. Down load free demo, order full version online. |
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Schulenberg and Associates - http://www.schulenberg.com/
Factoring programs. Windows, free download. |
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Kaprekar Series Generator - http://kaprekar.sourceforge.net/
A java application for determining the Kaprekar Constants and Series for numbers in various radixes. |
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http://tnt.math.metro-u.ac.jp/nzmath/ - http://tnt.math.metro-u.ac.jp/nzmath/
Python based number theory oriented calculation system, developed at Tokyo Metropolitan University. Downloads, mailing list. |
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cBigNumber - http://www.imach.uran.ru/cbignum/
Portable C++ class for integers with unlimited range, designed to be fast, functional and simple in use. |
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http://tnt.math.metro-u.ac.jp/simath/ - http://tnt.math.metro-u.ac.jp/simath/
Computer algebra system for number theoretic applications. |
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http://modular.fas.harvard.edu/SAGE/ - http://modular.fas.harvard.edu/SAGE/
System for Arithmetic Geometry Experimentation: a framework for number theory, algebra, and geometry, initially designed for computing with elliptic curves and modular forms, by William Stein. Open source under GPL. |