Fatto matematico: 4493 is the number of ways to divide a 11×11 grid of points into two sets using a straight line.
Trivia: 4493 is an uninteresting number.
Data storica: April 19th is the day in 1919 that Leslie Irvin of the United States makes the first successful voluntary free-fall parachute jump using a new kind of self-contained parachute.