General fact: 850 is the maximum possible Fair Isaac credit score.
Mathematical fact: 850 is the number of trees on 14 vertices with diameter 7.
Trivia: 850 is the maximum possible Fair Isaac credit score.
Historical date: April 29th is the day in 1882 that the "Elektromote" – forerunner of the trolleybus – is tested by Ernst Werner von Siemens in Berlin.