Fait mathématique: 1015 is the number of chiral invertible knots with 12 crossings.
Culture générale: 1015 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: October 11th is the day in 1972 that a race riot occurs on the United States Navy aircraft carrier Kitty Hawk off the coast of Vietnam during Operation Linebacker.