Hecho matemático: 5278 is the number of ways, up to symmetry, to pick 3 elements of an 8×8 grid.
Trivia: 5278 is a boring number.
Fecha histórica: June 13th is the day in 2010 that a capsule of the Japanese spacecraft Hayabusa, containing particles of the asteroid 25143 Itokawa, returns to Earth.