Fait mathématique: 1505 is the number of necklaces possible with 6 beads, each being one of 5 colors.
Culture générale: 1505 is an uninteresting number.
Date historique: February 13th is the day in 2004 that the Harvard-Smithsonian Center for Astrophysics announces the discovery of the universe's largest known diamond, white dwarf star BPM 37093.