A program for finding primes, prime factorization, and drawing the prime number spiral

	Prime Factors
Windows software to find prime numbers, pairs of primes, all factors of a given number (and more)

This software is fully-functional and not time-limited. It runs on any version of Windows.

Click here for how to get this software by donation.

Prime Factors may be used to:

get the prime decomposition of all numbers in a range of numbers up to 2,147,483,646,
get all factors (prime and non-prime) of a single number,
get all factors of all numbers in a range of numbers,
find only the prime numbers in a range of numbers,
find pairs of prime numbers (e.g. 107 and 109) in a certain range,
find Fermat primes and Mersenne primes < 2,147,483,647,
draw the Ulam prime number spiral
and more.

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. The main screen looks like this:

Prime Factors screenshot

Examples of the use of the program are given in the user manual. Following accepted mathematical convention, the number 1 is not held to be a prime number.

User Manual

Prime Factors

Windows software to find prime numbers, pairs of primes, all factors of a given number (and more)

Windows software to find prime numbers, pairs of primes,
all factors of a given number (and more)