Hecho general: 10313 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 10313 is a boring number.
Trivia: 10313 is an uninteresting number.
Fecha histórica: March 26th is the day in 1991 that Argentina, Brazil, Uruguay and Paraguay sign the Treaty of Asunción, establishing Mercosur, the South Common Market.