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Old 2019-08-07, 21:33   #1
baih's Avatar
Jun 2019

3410 Posts
Default Question about Exponentiation modulaire

how to calculate pow(2,23571176971393,1523213.17)

I mean
with b non integer = 123213.17

Have a nice day. :)
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Old 2019-08-09, 14:21   #2
lavalamp's Avatar
Oct 2007
Manchester, UK

55216 Posts

For the specific case of 1523213.17, you could compute mod 152321317 instead, then once you have that value use it to compute your final float mod.

In general, I suppose it depends on how many decimal digits you have and how much precision you need, but multiplying your modulo by 10^n should work decently well for many inputs.
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