Fait général: 10013 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 10013 is an uninteresting number.
Culture générale: 10013 is a boring number.
Date historique: May 31st is the day in 1970 that the Ancash earthquake causes a landslide that buries the town of Yungay, Peru; more than 47,000 people are killed.