Re: Trailing zeros of 100!

From	Bernardo Sulzbach <mafagafogigante@gmail.com>
Newsgroups	comp.lang.python
Subject	Re: Trailing zeros of 100!
Date	2016-01-02 15:24 -0200
Message-ID	<mailman.174.1451755511.11925.python-list@python.org> (permalink)
References	(1 earlier) <CAHzaPEOzP+DZDHOV7s1tDA0AUNhFdBUJKZWCJ5W9F8ec6aH-JA@mail.gmail.com> <mailman.162.1451745109.11925.python-list@python.org> <n68s1t$ke9$1@news.albasani.net> <mailman.172.1451753180.11925.python-list@python.org> <n68vgc$qi6$1@news.albasani.net>

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On Sat, Jan 2, 2016 at 2:56 PM, Robin Koch <robin.koch@t-online.de> wrote:
>
> Yes, should work for n >= 1.
>

The first power of 10 for which it fails in my machine is 10 ^ 17,
which is not that much for modern computers. Discrete math should not
meet floating points.

I would post the "canonical" solution here if Peter Otten hadn't just
posted it. You can use Wolfram Alpha - or Otten's solution - to see
that your solution fails for inputs equal to and larger than 10^17
(there likely is a lower bound, but I won't do binary search to find
it).

-- 
Bernardo Sulzbach

Thread

Trailing zeros of 100! katye2007@gmail.com - 2016-01-02 03:49 -0800
  Re: Trailing zeros of 100! David <bouncingcats@gmail.com> - 2016-01-02 23:19 +1100
  Re: Trailing zeros of 100! katye2007@gmail.com - 2016-01-02 04:34 -0800
  Re: Trailing zeros of 100! Vlastimil Brom <vlastimil.brom@gmail.com> - 2016-01-02 13:44 +0100
  Re: Trailing zeros of 100! "yehudak ." <katye2007@gmail.com> - 2016-01-02 15:14 +0200
    Re: Trailing zeros of 100! Robin Koch <robin.koch@t-online.de> - 2016-01-02 16:57 +0100
      Re: Trailing zeros of 100! Tony van der Hoff <tony@vanderhoff.org> - 2016-01-02 17:09 +0100
        Re: Trailing zeros of 100! Robin Koch <robin.koch@t-online.de> - 2016-01-02 17:56 +0100
          Re: Trailing zeros of 100! Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-02 15:24 -0200
          Re: Trailing zeros of 100! Chris Angelico <rosuav@gmail.com> - 2016-01-03 08:57 +1100
            Re: Trailing zeros of 100! Robin Koch <robin.koch@t-online.de> - 2016-01-03 01:02 +0100
              Re: Trailing zeros of 100! Ben Finney <ben+python@benfinney.id.au> - 2016-01-03 11:20 +1100
              Re: Trailing zeros of 100! srinivas devaki <mr.eightnoteight@gmail.com> - 2016-01-03 07:16 +0530
          Re: Trailing zeros of 100! Tony van der Hoff <tony@vanderhoff.org> - 2016-01-03 11:53 +0100
  Re: Trailing zeros of 100! Joel Goldstick <joel.goldstick@gmail.com> - 2016-01-02 09:57 -0500
  Re: Trailing zeros of 100! Vlastimil Brom <vlastimil.brom@gmail.com> - 2016-01-02 16:24 +0100
  Re: Trailing zeros of 100! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-01-02 15:30 +0000
  Re: Trailing zeros of 100! Robin Koch <robin.koch@t-online.de> - 2016-01-02 16:54 +0100
    Re: Trailing zeros of 100! Peter Otten <__peter__@web.de> - 2016-01-02 18:18 +0100
  Re: Trailing zeros of 100! Tim Chase <python.list@tim.thechases.com> - 2016-01-02 10:33 -0600
  Re: Trailing zeros of 100! "yehudak ." <katye2007@gmail.com> - 2016-01-02 19:34 +0200
  Re: Trailing zeros of 100! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-01-02 17:44 +0000
    Re: Trailing zeros of 100! Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-03 00:36 +0100
  Re: Trailing zeros of 100! Serhiy Storchaka <storchaka@gmail.com> - 2016-01-02 20:28 +0200
  Re: Trailing zeros of 100! Vlastimil Brom <vlastimil.brom@gmail.com> - 2016-01-02 19:29 +0100
  Re: Trailing zeros of 100! "yehudak ." <katye2007@gmail.com> - 2016-01-02 22:02 +0200
  Re: Trailing zeros of 100! "yehudak ." <katye2007@gmail.com> - 2016-01-02 22:09 +0200
  Re: Trailing zeros of 100! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-01-02 21:25 +0000
  Re: Trailing zeros of 100! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-01-02 21:26 +0000

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