Hecho matemático: 4930 is 6677_{9} = 2A2A_{12} = 2323_{13} = 1010_{17}, each using two digits exactly twice each.
Trivia: 4930 is a boring number.
Fecha histórica: June 30th is the day in 1921 that U.S. President Warren G. Harding appoints former President William Howard Taft Chief Justice of the United States.