Fait mathématique: 2943 is the smallest value of n for which n and 6n together use each digit 1-9 exactly once.
Culture générale: 2943 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: January 21st is the day in 1997 that Newt Gingrich becomes the first leader of the United States House of Representatives to be internally disciplined for ethical misconduct.