Message 259421 - Python tracker

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In-reply-to
Author	skrah
Recipients	jneb, mark.dickinson, serhiy.storchaka, skrah
Date	2016年02月02日.19:10:40
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1454440240.68.0.839073260237.issue26256@psf.upfronthosting.co.za>

Content
Jurjen, this is very nice! -- Like Mark, I'm not sure if this should be in CPython. Decimal (Python >= 3.3) has sneaked in a couple of fast bignum algorithms, so calculating and converting the latest Mersenne prime takes a couple of seconds: from decimal import * c = getcontext() c.prec = MAX_PREC c.Emax = MAX_EMAX c.Emin = MIN_EMIN x = Decimal(2)**74207281 - 1 s = str(x) assert s[:12] == "300376418084" assert s[-12:] == "391086436351"

Content

Jurjen, this is very nice! -- Like Mark, I'm not sure if this should be in CPython.
Decimal (Python >= 3.3) has sneaked in a couple of fast bignum
algorithms, so calculating and converting the latest Mersenne
prime takes a couple of seconds:
from decimal import *
c = getcontext()
c.prec = MAX_PREC
c.Emax = MAX_EMAX
c.Emin = MIN_EMIN
x = Decimal(2)**74207281 - 1
s = str(x)
assert s[:12] == "300376418084"
assert s[-12:] == "391086436351"

History
Date	User	Action	Args
2016年02月02日 19:10:40	skrah	set	recipients: + skrah, jneb, mark.dickinson, serhiy.storchaka
2016年02月02日 19:10:40	skrah	set	messageid: <1454440240.68.0.839073260237.issue26256@psf.upfronthosting.co.za>
2016年02月02日 19:10:40	skrah	link	issue26256 messages
2016年02月02日 19:10:40	skrah	create

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