Primes is a search tool for prime numbers. It allows you to search primes in different manners, and can generate primes of very big sizes (up to 200 digits or more).

For efficiency reasons, the tool will first give you lists of probable primes as search result; you can then click on the number to pass a rigorous primality test on it. (Note however that you only have one chance over billions to find a probable prime which is not prime.)

Useful online tools: Factoris (available in another window of your browser)

The most recent versionPlease take note that WIMS pages are interactively generated; they are not ordinary HTML files. They must be used interactively ONLINE. It is useless for you to gather them through a robot program.

- Description: searching for primes in different ways. interactive exercises, online calculators and plotters, mathematical recreation and games, Pôle Formation CFAI-CENTRE
- Keywords: CFAI,interactive math, server side interactivity, algebra, arithmetic, number, primes, cryptology