TWIN PRIMES, VISUALIZED  Primes are separated by bigger gaps as numbers increase, but primes continue to appear as “twin primes” (green triangles) no matter how high you go.

Michael Branigan

Mathematicians have conjectured since Euclid’s time that there are infinite pairs of prime numbers separated from each other by 2. Despite the fact that primes are separated on average by bigger gaps as numbers increase, evidence suggests that primes continue to appear as “twin primes” (green triangles) no matter how high you go.