Prime Factors

For factoring integers, finding primes and generating the prime number spiral.

Prime Factors is a Windows program to find factors of numbers up to 2,147,483,646 and to find primes, pairs of primes and Palmen colors of numbers. Or in more detail, Prime Factors may be used: (1) to get the prime decomposition of all numbers in a range of numbers, (2) to get all factors of a single number or all factors of all numbers in a range, (3) to find only the prime numbers in a range of numbers, (4) to find pairs of prime numbers (e.g. 107 and 109) in a certain range, (5) to count (without displaying) the prime numbers in a range of numbers, (6) to find the Palmen color of a number or the colors of a range of numbers and (7) to generate the Ulam prime number spiral. In addition a "filter" condition may be set to allow examination of numbers with a constant offset from an arithmetical or a geometrical progression, e.g., just those numbers of the form 7*n - 12 or 10n + 2.

Operating system: Win XP,Win 98,Win 2000,WinVista x32,WinVista x64,Win7 x32,Win7 x64,Win8 x32,Win8 x64,Win10 x32,Win10 x64

Program URL:

Prime Factors screenshot


Special permissions

See End User License Agreement


Hermetic Systems is the business name of Peter Meyer,, the developer of this software, and the owner and maintainer of the Hermetic Systems website at The Prime Factors software ("the Software") consists of the executable file and the other files installed by the installation program prf1470_setup.

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