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Old 2020-05-13, 18:20   #8
Uncwilly
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Apfloat also works nice: http://www.apfloat.org/apfloat/
Also http://numcalc.com/ handles it quickly
And 2^50000-1 is not prime. The exponent has to be prime.

Last fiddled with by Uncwilly on 2020-05-13 at 18:21
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