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This is Numberphile. We mainly post videos about mathematics and just numbers in general.

Leyland Numbers

Leyland Numbers

Leyland Numbers and Leyland Primes with Professor Ed Copeland...

Reddit discussion: http://redd.it/2kl1wp

Professor Ed Copeland is a physics and cosmology professor at the University of Nottingham.

With thanks to Paul Leyland: http://www.leyland.vispa.com

The Wikipedia Page is a good jump-off point for plenty of detailed stuff about Leyland Numbers: http://en.wikipedia.org/wiki/Leyland_number OEIS

Leyland Numbers: http://oeis.org/A076980

Article: http://www.leyland.vispa.com/numth/primes/xyyx.htm

And thanks to the Leyland Brothers for childhood memories! :)

All Triangles are Equilateral

All Triangles are Equilateral

The Making of a Mile of Pi

The Making of a Mile of Pi