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CRT for large numbers about kactl HOT 2 CLOSED

simonlindholm avatar simonlindholm commented on August 19, 2024
CRT for large numbers

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Chillee avatar Chillee commented on August 19, 2024

I don't think this is really an issue. We can just use __int128_t if needed. It might be a good idea to make CRT templated to facilitate that.

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simonlindholm avatar simonlindholm commented on August 19, 2024

Sure, but it's a subtle gotcha that it can overflow even though mn < 2^63 (and __int128_t is slower). Fixed that in 12af084. For larger numbers than that I'm fine with __int128_t (Garner's algorithm is faster for many small numbers, but that probably doesn't matter in practice.)

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