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The Four Color Map Theorem (or colour!?) was a long-standing problem until it was cracked in 1976 using a “new” method… computers!
A little bit of extra footage from this: https://youtu.be/laMkuPrad3s
This video features Dr James Grime – http://jamesgrime.com
More Grime videos: http://bit.ly/grimevideos
Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile
We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science.