Also impressing is Sloane's On-Line Encyclopedia of Integer Sequences
Stanford Encyclopedia of Philosophy
The Columbia Encyclopedia, Sixth Edition. 2001.
Here are some Prime Number www pages:
The best Prime Number Page in the World www.utm.edu/research/primes maintained by Chris Caldwell
The Number Theory Discussion List
The Prime puzzles and problems
Very good Encyclopedia of Mathematics
Springer Online Encyclopedia of Mathematics
Great Internet Mersenne Primes Search
Unsolved problems in mathematics
The Matthew R. Watkins Number Theory, Riemann Hypothesis and Physics Page
Aesthetics of Prime Numbers Sequence
If you do not understand Quantum Mechanics take a look here or here
Here I am checking what is going on the World:
PAP (Polish Press Agency)