findPrimeFactors is a standalone application which finds the prime factors of an integer, except when the integer contains more than one large prime.

I am releasing findPrimeFactors with an easy-to-meet license. It is unconditionally available for any use, but is without warranty.

findPrimeFactors is compiled for Mac OS X (Intel), Windows, and Linux.

findPrimeFactors was built with Real Studio 2012 Release 2.1.


Version 1.5 allows the user to enter a time limit. If exceeded, the current factors are output with a warning that at least one of the factors is not prime.

Version 1.6 allows commas in the input number.

Download findPrimeFactors v 1.6. (1.8 MB) (1.7 MB) (2.4 MB)

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