The record had stood for more than a decade before it was finally broken last month.
On July 24, Markus Frind, Paul Jobling, and Paul Underwood announced that they had discovered the first sequence consisting of 23 prime numbers in arithmetic progression. This surpasses the previous record of 22 primes in arithmetic progression, set in 1993.
A prime is a positive integer evenly divisible only by itself and 1.