in reply to Math With Big Numbers
For fun on the quadmath perl I use:
$ perl -V | grep nvsize nvsize=16 $ perl -E 'say 6**25; say ~0' 28430288029929701376 18446744073709551615
Quadmath works in this case, but of course you really want to use bigint, Math::BigInt, Math::GMP, Math::GMPz, etc. as this is just putting it off (e.g. 6^42 is exact but 6^43 is not).
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