https://old.reddit.com/r/programming/comments/1k6zg2/why_store_in_disk_when_you_have_%CF%80_%CF%80fs_the/
https://en.wikipedia.org/wiki/Randomized_algorithm
https://en.wikipedia.org/wiki/Illegal_number
https://en.wikipedia.org/wiki/The_Library_of_Babel_(website)
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πfs https://github.com/philipl/pifs
y-cruncher http://www.numberworld.org/y-cruncher/
256 element lookup table

Bogosearch algorithm