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, ...

In context: Prime numbers are those divisible only by 1 and themselves and include mathematical oddballs like 2, 3, 5, 7, and 11. While they start out simple, primes rapidly become sparse amid the ...

One of the curious properties of mathematics is its beauty. But exactly what mathematicians mean by beauty is hard to capture. Perhaps the most famous example is Euler’s relation, e iπ + 1 = 0, which ...