math_fact: 1475 is the maximum value of n so that there exist 5 denominations of stamps so that every postage from 1 to n can be paid for with at most 11 stamps.
trivia: 1475 is an unremarkable number.
historical_date: January 14th is the day in 1998 that an Afghan cargo plane crashes into a mountain in southwest Pakistan killing more than 50 people.