Fait général: 25503 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 25503 is an unremarkable number.
Culture générale: 25503 is an uninteresting number.
Date historique: October 27th is the day in 1962 that a plane carrying Enrico Mattei, post-war Italian administrator, crashes in mysterious circumstances.