GNU bug report logs - #33765
emacs-26.1-mac-7.4; (expt 2 140) ; produces 0 in scratch buffer, unexpectedly

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Package: emacs;

Reported by: Van L <van <at> scratch.space>

Date: Sun, 16 Dec 2018 06:25:02 UTC

Severity: wishlist

Fixed in version 27.1

Done: Glenn Morris <rgm <at> gnu.org>

Bug is archived. No further changes may be made.

Full log

Message #20 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Van L <van <at> scratch.space>
Cc: bug-gnu-emacs <at> gnu.org, 33765 <at> debbugs.gnu.org
Subject: Re: bug#33765: emacs-26.1-mac-7.4; (expt 2 140) ;
 produces 0 in scratch buffer, unexpectedly
Date: Sun, 16 Dec 2018 15:07:48 +0200

On December 16, 2018 1:11:25 PM GMT+02:00, Van L <van <at> scratch.space> wrote:
> 
> > Why do you say this is unexpected?
> 
> I am not a mathematician but I believe the answer is wrong for 2^140.

The correct value cannot be represented in an Emacs fixnum.  What did you expect Emacs to do?  IOW, what would be the "expected" result, given the limited range of integers we can represent?

> > If you want the same support for huge numbers as in Scheme, try
> Emacs 27.
> 
> I take that to mean the master branch but the emacs-mac repo-updates
> are less freq. than gnu-emacs’s.

Some features, such as this one, will not be available in older versions.
This bug report was last modified 6 years and 238 days ago.

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