This number is a prime.
Jane Addams became the first American woman to be awarded the Nobel Peace Prize in 1931. [Green]
Star Trek actors William Shatner (aka Captain Kirk) and Leonard Nimoy (aka Spock) were both born in the third month of 1931. [Green]
Nevada legalizes gambling in 1931. [Green]
Until Major League Baseball changed rules in the prime year 1931, a ball that bounced into the stands was a unit (home run) rather than a prime (double). [Post]
The only prime concatenated from a pair of double-digit primes of form (n^2-6, n^2+6), where n is a prime. [Loungrides]
The largest of only three mountain primes each concatenated from two double-digit primes. The other two are 1361, 1741. [Loungrides]