Prime numbers

General
Factorisation
Mersenne primes
Personal home pages
Riemann zeta function

General

The Prime Pages (by Chris Caldwell)
Special primes (by Charles Greathouse)
The largest known primes
www.primzahlen.de
Cunningham project
Gary Croft's demystified primes

Personal home pages

Manindra Agrawal in Kanpur
Kevin Broughan in Hamilton
Chris Caldwell in Martin
Daniel Goldston in San Josè
Andrew Granville in Montreal
Ben Green in Bristol
Alessandro Languasco in Padova
Thomas Nicely
Landon Curt Noll
Tomas Oliveria e Silva in Aveiro
Carl Pomerance in Hanover
Tarlok Nath Shorey in Mumbai
Susan Stepney in Cambridge, UK
Jörn Steuding in Würzburg
Zhi-Wei Sun in Nanjing
Terence Tao in Los Angeles
Samuel Wagstaff in West Lafayette
Alessandro Zaccagnini in Parma
Paul Zimmerman in Nancy
Prime number records

Riemann zeta function

Beautiful page on zeta and physics

Mersenne primes

GIMPS

Factorisation

Algorithms
Cryptology