Jens Kruse Andersen:
Largest Known Simultaneous Primes
The Largest Known Primes in CPAP's
Primes in Arithmetic Progression
Largest Consecutive Factorizations
Jens Kruse Andersen (duplication page for updates by Norman Luhn)
prime records - main page
Dirk Augustin, hosted by Jens Kruse Andersen:
Cunningham Chain records
N.J. A. Sloane:
The On-Line Encyclopedia of Integer Sequences
Thomas J Engelsma :
Permissible Patterns
Robin Whitty:
Theorem of the Day
Dr. Minh. L. Perez Press:
SMARANDACHE PRIMES
Henri Lifchitz & Renaud Lifchitz:
Largest Known PRPs
Patrick De Geest:
World!Of Numbers
Riecoin:
Constellation Explorer
Steffen Polster: (german):
Mathematik alpha
Makoto Kamada:
Factorization of 11...11 (Repunit)
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
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Julius Schön , hosted by Norman Luhn:
(Prime Tuplet 6,5,4,3,Cousin Database)