Evil Number
Additional information
Is there a more evil number than Belphegor's Prime...
Don't miss the extra footage on Numberphile2: https://youtu.be/9CcI5M1LfRs
This video features Professor Tony Padilla from the University of Nottingham.
More Tony videos: http://bit.ly/Padilla_Numberphile
666 video: https://youtu.be/UkZqFtYtqaI