Factorizer may be used to: • get the prime decomposition (a.k.a. prime factorization) 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, or all factors of all numbers in a range, • find only the prime numbers in a range of numbers, • find pairs of prime numbers (e.g. 107 and 109) in a certain range, • count (without displaying) the prime numbers in a range of numbers. • find Fermat primes and Mersenne primes < 2,147,483,647 • find the "Palmen color" of a number or the colors of a range of numbers.
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 text in the output window can be edited, so you can remove unwanted output and add your own comments before copying to the clipboard for transfer to another program such as a text editor.
Examples of the use of the program are given below, first without a filter condition in effect, then with various filters in effect.
Following accepted mathematical convention, the number 1 is not held to be a prime number.