The online computer game “Is this prime?” tests a player’s knowledge of prime numbers—and just surpassed 2,999,999 attempts. Give it a whirl. The Greek mathematician Euclid may very well have proved, ...
Gong, Sherry, and Scott Duke Kominers. "On Congruence Conditions for Primality." A26. INTEGERS: Electronic Journal of Combinatorial Number Theory 10 (2010): 313–317.
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