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.

Prime numbers have captivated mathematicians for centuries with their unpredictable and seemingly random distribution. In a groundbreaking preprint study, researchers devised a novel method that ...

Prime numbers are absolutely essential to modern computer security -- and, possibly, to communicating with alien life forms. Here's how they work.

The ongoing search for ever-larger prime numbers continues apace. Primes are the atoms of arithmetic: every whole number is a unique product of primes. For example, 21 is the product of primes ...