Fatto matematico: 568 is the smallest number whose 7^{th} power can be written as the sum of seven 7^{th} powers.
Trivia: 568 is an unremarkable number.
Data storica: July 21st is the day in 1972 that Bloody Friday bombings by the Provisional IRA around Belfast, Northern Ireland – 22 bombs are detonated, killing 9 and seriously injuring 130.