Number Theory
DOS Beowulf
Simple, inexpensive Beowulf supercomputing clusters for DOS
https://dosbeowulf.tripod.com/
PARI/GP Development Headquarters
Science, Math, Number Theory, Software - PARI-GP Download Area. Latest versions in source and compiled form.
http://pari.math.u-bordeaux.fr/
On the The Kaprekar Series
Introduction to the Kaprekar Series Generator
https://kaprekar.sourceforge.net/
Apfloat Home Page
Science, Math, Number Theory, Software - apfloat. High-performance arbitrary precision arithmetic package for C++ and Java.
http://www.apfloat.org/
Factoring programs. Windows, free download.
software for stock market timing and QQQQ buy and sell signals
http://www.schulenberg.com/
Number Theory in Shandong University
Science, Math, Number Theory, Research Groups - (China) Shandong University. Number theory research group.
http://www.prime.sdu.edu.cn/
Ray Ballinger's Proth Search Page
Science, Math, Number Theory, Prime Numbers - Yves Gallot's Proth Search Page. A list of prime number searches using Yves Gallot's proth.
https://www.prothsearch.net/
mersenneforum.org - Powered by vBulletin
Science, Math, Number Theory, Prime Numbers - mersenneforum.org. A forum about prime numbers and computerized searches for more of them.
https://www.mersenneforum.org/
Ars Technica Team Prime Rib
Science, Math, Number Theory, Prime Numbers - Ars Technica Team Prime Rib. A distributed computing team dedicated to finding Mersenne prime numbers.
http://www.teamprimerib.com/
NumberSpiral.com - Home
Science, Math, Number Theory, Prime Numbers - Number Spiral. Explains this method of visually representing the distribution of primes and the relationships between factors and products.
https://numberspiral.com/
The Prime Puzzles & Problems Connection, by Carlos Rivera
Science, Math, Number Theory, Prime Numbers - The Prime Puzzles Problems Connection. Carlos Rivera's collection of problems and puzzles related to prime numbers.
https://www.primepuzzles.net/