The Simple Math Problem That Took 244 Years To Crack
In 1734, Leonhard Euler proved that the sum of the reciprocal squares -- 1 + 1/4 + 1/9 + 1/16 + ... -- equals pi squared over six. Thanks to Brilliant for sponsoring this video! Try everything Brilliant has to offer at — and get ... Do odd perfect numbers exist? Head to to start your free 30-day trial, and the first 200 people get ... Grigori Perelman solved one of the world's hardest
