Fait général: 2541 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2541 is a boring number.
Culture générale: 2541 is an unremarkable number.
Date historique: December 15th is the day in 1973 that the American Psychiatric Association votes 13–0 to remove homosexuality from its official list of psychiatric disorders, the DSM-II.