Fait mathématique: 8230 is the number of necklaces with 8 beads, each one of 4 colors.
Culture générale: 8230 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: July 13th is the day in 1260 that the Livonian Order suffers its greatest defeat in the 13th century in the Battle of Durbe against the Grand Duchy of Lithuania.