Marcel Martin | PRIMO - "Elliptic Curve Primality Proving" software |
Andreas Enge | CM - "Elliptic Curve Primality Proving" software |
N. J. A. Sloane | OEIS - The On-Line Encyclopedia of Integer Sequences |
Thomas J. Engelsma | Permissible patterns of prime k-tuplets |
Robin Whitty | Theorem of the Day |
Dr. Minh. L. Perez Press | Smarandache Primes |
Henri Lifchitz & Renaud Lifchitz | PRP -records |
Patrick De Geest | World!Of Numbers |
Riecoin | Constellation Explorer |
Makoto Kamada | Factorization of Repunits |
Markus Tervooren | Data Base of Factors (factordb.com) |
Matthew C. Anderson, hosted by Norman Luhn | Prime Constellations Page Blog of Matthew C. Anderson on mersenneforum.org |
GIMPS | Great Internet Mersenne Prime Search |
Dario Alpern | Integer factorization calculator |
Henri Lifchitz | BiTwin records |