Fait mathématique: 1311 is the trinomial coefficient T(19,16).
Culture générale: 1311 is an unremarkable number.
Date historique: August 3rd is the day in 1997 that Oued El-Had and Mezouara massacre in Algeria; a total of 116 villagers killed, 40 in Oued El-Had and 76 in Mezouara.