Fait mathématique: 8340 is a value of n so that (n-1)^{2} + n^{2} + (n+1)^{2} is a palindrome.
Culture générale: 8340 is a boring number.
Date historique: October 31st is the day in 1863 that the Maori Wars resumes as British forces in New Zealand led by General Duncan Cameron begin their Invasion of the Waikato.