Fait mathématique: 5257 is a member of the Fibonacci-type sequence starting with 1 and 8.
Culture générale: 5257 is an uninteresting number.
Date historique: May 23rd is the day in 1813 that South American independence leader Simón Bolívar enters Mérida, leading the invasion of Venezuela, and is proclaimed El Libertador ("The Liberator").