## Jim Howell’s Math Page

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### Tables of Factors

The Internet has many tables of factors of various kinds of numbers.
For example,
the Cunningham Project finds factors of numbers
of the form a^n-1 and a^n+1, where “a” is from 2 to 12,
and “n” goes up to some limit,
so that the numbers to be factored are of some reasonable size,
say under 200 digits or so.
Links to some tables of factors.

The following sites have links to several tables of factors.
I have factorization tables for the following types of numbers:
Hisanori Mishima also has a table for
prime numbers strung together.

### Mathematical Links

- The
“Great Internet Mersenne Prime Search” (GIMPS)
has found several previously unknown
Mersenne Primes.
The most recent (but not largest) one is 2^42,643,801-1,
found on April 12th, 2009.
See my prime page for details.
- A list of
Mersenne Primes.
- 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.
- NFSNet
is (or was) a distributed computing project
that uses the Number Field Sieve method to factor various numbers.
- How do you find the prime factors of a number?
My factoring page
has a list of several methods of factoring by computer,
and a start at explaining how some of these methods work.
- FactorWorld
is another web site about factoring.

- Jim Loy
has an extensive website about a variety of subjects,
including math.

- 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
math problems.
Good luck to any potential solvers!

- Here are
biographies of many mathematicians.

- Some recent papers
(“e-prints”) in the field of number theory.

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

Go to my home page.
This page was last updated on March 6, 2011.