General fact: 2518 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 2518 is an uninteresting number.
Trivia: 2518 is an unremarkable number.
Historical date: November 22nd is the day in 845 that the first King of all Brittany, Nominoe defeats the Frankish king Charles the Bald at the Battle of Ballon near Redon.