Fatto matematico: 8913 is the maximum value of n so that there exist 4 denominations of stamps so that every postage from 1 to n can be paid for with at most 27 stamps.
Trivia: 8913 is an unremarkable number.
Data storica: May 26th is the day in 1770 that the Orlov Revolt, an attempt to revolt against the Ottoman Empire before the Greek War of Independence, ends in disaster for the Greeks.