Hecho matemático: 617 is 1!^{2} + 2!^{2} + 3!^{2} + 4!^{2}.
Trivia: 617 is an unremarkable number.
Fecha histórica: September 8th is the day in 1514 that Battle of Orsha – in one of the biggest battles of the century, Lithuanians and Poles defeat the Russian army.