Fatto matematico: 7142 is the smallest number that can not be written as the sum of 2 volumes of rectangular boxes with integer dimensions less than 20.
Trivia: 7142 is a boring 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.