Fatto matematico: 771 is the number of intersections when all the diagonals of a regular 14-gon are drawn.
Trivia: 771 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 9th is the day in 1959 that the R-7 Semyorka, the first intercontinental ballistic missile, becomes operational at Plesetsk, USSR.