math_fact: 339 is the number of ways to divide 5 black and 5 white beads into piles.
trivia: 339 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: December 4th is the day in 1918 that U.S. President Woodrow Wilson sails for the World War I peace talks in Versailles, becoming the first US president to travel to Europe while in office.