Fait général: 2104 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2104 is an uninteresting number.
Culture générale: 2104 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: October 4th is the day in 1636 that the Swedish Army defeats the armies of Saxony and the Holy Roman Empire at the Battle of Wittstock.