General fact: 255 is the largest representable integer in an unsigned byte.
Mathematical fact: 255 is a repdigit in base 2 (11111111) in base 4 (3333), and in base 16 (FF).
Trivia: 255 is the largest representable integer in an unsigned byte.
Historical date: September 11th is the day in 1932 that Franciszek Żwirko and Stanisław Wigura, Polish Challenge 1932 winners, are killed when their RWD 6 airplane crashes during a storm.