math_fact: 8320 is the number of subsets of {1, 1/2, 1/3, ... 1/42} that sum to an integer.
trivia: 8320 is a boring number.
historical_date: October 11th is the day in 1929 that JC Penney opens store #1252 in Milford, Delaware, making it a nationwide company with stores in all 48 U.S. states.