Fait mathématique: 8129 is a member of the Fibonacci-type sequence starting with 2 and 7.
Culture générale: 8129 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: April 3rd is the day in 1933 that First flight over Mount Everest, a British expedition, led by the Marquis of Clydesdale, and funded by Lucy, Lady Houston.