Rubiks Cube
Jessica Wecker—Getty Images/Photo Researchers RM
January 2, 2015 8:38 AM EST

While some people might fritter away seven and a half hours bingeing on Netflix, YouTuber RedKB (in real life, Kenneth Brandon) has made more productive use of his time. Over the course of five days, working for several hours at a time, he was able to solve the world’s most challenging Rubik’s Cube: a 17x17x17 block.

Brandon started by solving each color’s center, then finished with the border, which proved much easier. For puzzlers with a lot of time on their hands and an itch to see the play-by-play, Brandon has posted the full seven-plus hour version as well.


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