The latest Numberphile video reveals a number I had never heard of - Mills' Constant.
It by plugging it into a simple equation, it generates an infinite number prime numbers.
But there's a catch:
After posting the video, a lot of people asked for the proof.
Dr James Grime - who stars in the video - has since sent me a link to the proof.
HERE IT IS.
Want more prime number videos? Here is our prime playlist.