Fatto generale: 41 is the number of members in the U.S. Senate needed to defeat a cloture vote and sustain a filibuster indefinitely.
Fatto matematico: 41 is the smallest integer whose reciprocal has a 5-digit repetend.
Trivia: 41 is the number of soldiers in The Expendables (2010 film) tactor Eric Roberts laments to his subordinates about having been killed by star Sylvester Stallone in his escape from their island.
Data storica: February 10th is the day in 1355 that the St. Scholastica's Day riot breaks out in Oxford, England, leaving 63 scholars and perhaps 30 locals dead in two days.