Hecho matemático: 2943 is the smallest value of n for which n and 6n together use each digit 1-9 exactly once.
Trivia: 2943 is a boring number.
Fecha histórica: January 21st is the day in 1954 that the first nuclear-powered submarine, the USS Nautilus, is launched in Groton, Connecticut by Mamie Eisenhower, the First Lady of the United States.