General fact: 313 is the number of Muslims who fought in the Battle of Badr against Muhammad's, and by extension, Islam's, foes.
Mathematical fact: 313 is the number of intersections when all the diagonals of a regular dodecagon are drawn.
Trivia: 313 is the number of Muslims who fought in the Battle of Badr against Muhammad's, and by extension, Islam's, foes.
Historical date: November 8th is the day in 1965 that the British Indian Ocean Territory is created, consisting of Chagos Archipelago, Aldabra, Farquhar and Des Roches islands.