Fait mathématique: 7773 is the number of stable patterns with 17 cells in Conway's game of Life.
Culture générale: 7773 is an uninteresting number.
Date historique: April 12th is the day in 1934 that the U.S. Auto-Lite Strike begins, culminating in a five-day melee between Ohio National Guard troops and 6,000 strikers and picketers.