- My software page contains some software that you may download. This software does arithmetic and factoring of “large” integers and runs on Windows ®.
- My page about prime numbers, Mersenne numbers, and Fermat numbers.
- My page about factoring (determining the factors of a number).
- My page about aliquot sequences.

79 * 9 = 711 799 * 89 = 71111 7999 * 889 = 7111111 79999 * 8889 = 711111111 799999 * 88889 = 71111111111 7999999 * 888889 = 7111111111111 etc.

Links to some tables of factors.

- Cullen numbers. (n*2^n + 1)
- Woodall numbers. (n*2^n - 1)
- Fermat numbers, which are 2^(2^n) + 1

- Odd numbers strung together (1357, 1357911131517, etc.)
- Prime numbers strung together (235, 2357111317, etc.)

- The “Great Internet Mersenne Prime Search” (GIMPS) has found several previously unknown Mersenne Primes. The most recent one is 2^77,232,917-1, found on Decenber 26, 2017. See the GIMPS history page for a list of Mersenne primes discovered by GIMPS, and the GIMPS home page for more details.
- Lots of information on prime numbers can be found at the Prime Pages.
- The Prime Glossary has definitions and explanations of many terms that are related to prime numbers.
- The Prime Puzzles and Problems Connection has lots of puzzles related to prime numbers. All are invited to contribute solutions. There is a new puzzle every week.
- Paul Zimmermann’s ECMNET uses the Elliptic Curve Method to find factors of numbers. He also has links to many other mathematical sites.
- How do you find the prime factors of a number? My factoring page has a list of several methods of factorizing by computer, and a start at explaining how some of these methods work.
- FactorWorld
is another web site about factoring.
- Mike Keith’s home page.
- A website where you can
compute the n-th prime.
- The Clay Mathematics Institute
is offering $1,000,000 for the solution of each of
seven
Millennuim Problems.
Good luck to any potential solvers!
- Table of Mersenne Primes.
- Table of
Fermat numbers and their known factors.
- Here are biographies of many mathematicians.

Send me e-mail at jrhowell@ix.netcom.com

Go to my home page.

This page was last updated on March 19, 2018.