Fatto matematico: 4312 is the smallest number whose 10^{th} power starts with 7 identical digits.
Trivia: 4312 is an uninteresting number.
Data storica: October 21st is the day in 1520 that João Álvares Fagundes discovers the islands of Saint-Pierre and Miquelon, bestowing them their original name of "Islands of the 11,000 Virgins".