Fait mathématique: 6307 is the largest n so that Q(vn) has class number 8.
Culture générale: 6307 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: April 7th is the day in 1927 that First distance public television broadcast (from Washington, D.C., to New York City, displaying the image of Commerce Secretary Herbert Hoover).