05/28/2021

The smallest prime is 2—the only even prime number. The largest, as this book goes to press, is 2^2,976,221 − 1, an 895,932-digit number discovered by Gordon Spence in December 1997 on a home computer, using a program downloaded over the internet; if printed, it would fill a 450-page book.

— Eli Maor, E