Fatto matematico: 5629 is the maximum value of n so that there exist 5 denominations of stamps so that every postage from 1 to n can be paid for with at most 16 stamps.
Trivia: 5629 is a boring number.
Data storica: May 30th is the day in 1972 that the Angry Brigade goes on trial over a series of 25 bombings throughout the United Kingdom.