De Moivre, famous mathematician, is known to have predicted his own death. After finding that he slept 15 extra minutes with each night, he solved a series called an arithmetic progression, which is basically a series where the difference of each successive term is constant. example:

1 + 3 + 5 + 7… is an arithmetic progression because the difference between all terms is two.

Anyway, by summing this series up he figured out the day he would sleep for 24 hours, and declared that as the day he would die. He died on that very day – November 27th, 1754.