math_fact: 9748 is the maximum value of n so that there exist 6 denominations of stamps so that every postage from 1 to n can be paid for with at most 14 stamps.
trivia: 9748 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: September 8th is the day in 2004 that NASA's unmanned spacecraft Genesis crash-lands when its parachute fails to open.