Fait mathématique: 2510 is the maximum value of n so that there exist 6 denominations of stamps so that every postage from 1 to n can be paid for with at most 10 stamps.
Culture générale: 2510 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: November 14th is the day in 1952 that the first regular UK singles chart published by the New Musical Express.