Nice Ruby thread, now I'd like even more a isqrt in the Rust std lib 
They even have some suggestions for K = 9_999_899_999_899_999_322_536_673_279.
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Nice Ruby thread, now I'd like even more a isqrt in the Rust std lib They even have some suggestions for K = 9_999_899_999_899_999_322_536_673_279.