Fatto generale: 61004 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 61004 is an uninteresting number.
Trivia: 61004 is an uninteresting number.
Data storica: January 8th is the day in 1877 that Crazy Horse and his warriors fight their last battle against the United States Cavalry at Wolf Mountain, Montana Territory.