Featuring Sophie Maclean and superfactorials. Try the Halfsies challenge at https://brilliant.org/challenge/numbe... (and tell us your score!) or go to Brilliant's courses and start for free at https://brilliant.org/numberphile/ (episode sponsor)
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Sophie Maclean is based at Kings College, London: https://sophiethemathmo.wordpress.com

More Sophie on Numberphile: https://bit.ly/Sophie_Numberphile

Superpermutations:    • Superpermutations - Numberphile  
Superhero Triangles:    • Superhero Triangles - Numberphile  
The Super Bottle:    • Super Bottle - Numberphile  

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