TIL about Belphegor's prime, 1000000000000066600000000000001, a palindromic prime number with 666 at its heart and 13 zeros on either side. It was named after one of the Princes of Hell, who was charged with helping people make ingenious inventions and discoveries.

https://en.wikipedia.org/wiki/Belphegor%27s_prime
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gok62n/til_about_belphegors_prime/