The Melancholy of Haruhi Suzumiya
The Melancholy of Haruhi Suzumiya is a Japanese light-novel series written by Nagaru Tanigawa and illustrated by Noizi Ito, launched in 2003 and adapted into anime, manga, and games.
In 2011, a 4chan user trying to watch anime 'The Melancholy of Haruhi Suzumiya' in every episode order accidentally proved the lower bound of superpermutations, an unsolved mathematics problem. The proof went unnoticed for 7 years.
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