Fatto generale: 251 is the last and most powerful prime mover (engine) designed and built by the American Locomotive Company (ALCO).
Fatto matematico: 251 is the smallest number that can be written as the sum of 3 cubes in 2 ways.
Trivia: 251 is the last and most powerful prime mover (engine) designed and built by the American Locomotive Company (ALCO).
Data storica: September 7th is the day in 1999 that a 5.9 magnitude earthquake rocks Athens, rupturing a previously unknown fault, killing 143, injuring more than 500, and leaving 50,000 people homeless.