Fait mathématique: 71311 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 71311 is a boring number.
Date historique: March 29th is the day in 1500 that Cesare Borgia is given the title of Captain General and Gonfalonier by his father Rodrigo Borgia after returning from his conquests in the Romagna.