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Extra footage from this interview: https://youtu.be/7nBtRKvUox4
The Four Color Map Theorem: https://youtu.be/NgbK43jB4rQ
More on James Grime (you can book him for talks): http://singingbanana.com
More James Grime videos: http://bit.ly/grimevideos
The de Grey paper: https://arxiv.org/abs/1804.02385
A good write up on this topic via Quanta Magazine: https://www.quantamagazine.org/decades-old-graph-problem-yields-to-amateur-mathematician-20180417/
The Marijn Heule counterexample: http://www.cs.utexas.edu/users/marijn/CNP/553.png
More links & stuff in full description below ↓↓↓
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