Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.fsmpi.rwth-aachen.de!border2.nntp.ams2.giganews.com!backlog4.nntp.ams3.giganews.com!backlog4.nntp.ams.giganews.com!border2.nntp.ams.giganews.com!nntp.giganews.com!newsfeed.xs4all.nl!newsfeed3a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=python.org; s=200901; t=1390468486; bh=u1aZ2dKJBcXdDRegiZ//J7SEuDiYtKtweIrRG2pWmc8=; h=To:From:Subject:Date:References:In-Reply-To:From; b=p2YG4PVlTij32c688BNdLB2W8w5nLIeCFTKxvQd5JaJtGbIoR60B3lAN19Nh7Jgm7 XACh01Ui7ZmogNmTyTqa5S08WUnVscU36qW3mHAemf9Gj+Gsvh9vigmdp2dVyGiRFY XuJKDu/vAS2hvmzJ1hEZ57G2vY7Ub0kZuxbO6s78=
X-Spam-Status: OK 0.001
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; '(even': 0.05; 'cpython': 0.05; 'scaling': 0.07; 'integers': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'python': 0.11; 'arbitrarily': 0.16; 'from:name:christian heimes': 0.16; 'infinity': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'thereabouts.': 0.16; 'from:addr:python.org': 0.16; 'wrote:': 0.18; 'library': 0.18; 'bit': 0.19; 'header:User-Agent:1': 0.23; 'format,': 0.24; 'integer': 0.24; 'helpful': 0.24; 'header:X -Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'chris': 0.29; 'gives': 0.31; 'but': 0.35; 'there': 0.35; 'subject:?': 0.36; 'being': 0.38; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'cost.': 0.60; 'numbers': 0.61; 'worth': 0.66; 'believe': 0.68; 'difference.': 0.84
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Christian Heimes <christian@python.org>
Subject: Re: No overflow in variables?
Date: Thu, 23 Jan 2014 10:14:34 +0100
References: <dd6a72bf-b1c4-4868-9cfe-76dfac8b8787@googlegroups.com> <CAPTjJmqkSc+9O5XUWO6Zvm82eZ+853qgGugzA-Vngui4VPAQjw@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-Gmane-NNTP-Posting-Host: 212.12.46.3
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0
In-Reply-To: <CAPTjJmqkSc+9O5XUWO6Zvm82eZ+853qgGugzA-Vngui4VPAQjw@mail.gmail.com>
X-Enigmail-Version: 1.5.2
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.5877.1390468486.18130.python-list@python.org>
Lines: 12
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1390468486 news.xs4all.nl 2934 [2001:888:2000:d::a6]:35023
X-Complaints-To: abuse@xs4all.nl
X-Original-Bytes: 3743
Xref: csiph.com comp.lang.python:64585

On 22.01.2014 19:26, Chris Angelico wrote:
> Internally, I believe CPython uses the GNU Multiprecision Library
> (GMP), which gives an efficient representation and operation format,
> scaling to infinity or thereabouts. You can go to any size of integer
> you like without there being any difference. There's a cost to that
> (even small integers are a bit slower to work with), but it's SO
> helpful to be able to work with arbitrarily large numbers that it's
> worth that cost.

Small correction: Python isn't using GMP. Python uses its own
implementation.