Fait mathématique: 71431 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 71431 is an unremarkable number.
Date historique: July 27th is the day in 1919 that the Chicago Race Riot erupts after a racial incident occurred on a South Side beach, leading to 38 fatalities and 537 injuries over a five-day period.