Fatto matematico: 6611 is a value of n such that the n^{th} Cullen number is prime.
Trivia: 6611 is a boring number.
Data storica: February 5th is the day in 1913 that Greek military aviators, Michael Moutoussis and Aristeidis Moraitinis perform the first naval air mission in history, with a Farman MF.7 hydroplane.