Hecho matemático: 9529 is the number of 3×3 sliding puzzle positions that require exactly 18 moves to solve starting with the hole in a corner.
Trivia: 9529 is an unremarkable number.
Fecha histórica: February 1st is the day in 1876 that a murder conviction effectively forces the violent Pennsylvanian Irish anti-owner coal miners, the "Molly Maguires", to disband.