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Re: A Problem To Solve :-)

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On 2024-01-29 08:28:55 +0000, Farley Flud said:

> On Sun, 28 Jan 2024 16:44:22 -0600, Physfitfreak wrote:
> 
>> 
>> But do at least tell us you did it by hand or by a program.
>> 
> 
> I used a small C program to "brute force" the solution.
> 
> There may be a way to solve it with number theory, but I
> don't know very much about number theory.
> 
> Anyway, for three-digit, non-repeating integers (also with
> no digit being 0) there are 9*8*7 = 504 possibilities.  Only
> a crazy person would do it "by hand."

Hard to believe it now, but 65 years or so ago, when I was about 15, I 
was that crazy. I read somewhere that the factors of 11111 were 41 and 
271. I wondered if 1111111 had any factors, and if so what were they? I 
found 239 and 4649, _by hand_! No computers then (not ones I had access 
to, anyway) and I don't think I had access to a mechanical calculator.

-- 
athel -- biochemist, not a physicist, but detector of crackpots

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Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-01-27 17:22 -0600
  Re: A Problem To Solve :-) Farley Flud <ff@linux.rocks> - 2024-01-28 12:31 +0000
    Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-01-28 16:44 -0600
      Re: A Problem To Solve :-) Farley Flud <ff@linux.rocks> - 2024-01-29 08:28 +0000
        Re: A Problem To Solve :-) Athel Cornish-Bowden <me@yahoo.com> - 2024-01-29 11:53 +0100
          Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-02 23:56 -0600
        Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-01-30 01:25 -0600
        Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-01-31 18:18 -0600
      Re: A Problem To Solve :-) Stéphane CARPENTIER <sc@fiat-linux.fr> - 2024-02-02 21:49 +0000
  Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-03 04:00 -0600
    Re: A Problem To Solve :-) Farley Flud <ff@linux.rocks> - 2024-02-03 16:19 +0000
      Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-03 16:17 -0600
      Re: A Problem To Solve :-) Stéphane CARPENTIER <sc@fiat-linux.fr> - 2024-02-04 14:24 +0000
    Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-04 19:53 -0600
    Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-05 01:51 -0600
      Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-05 19:39 -0600
        Re: A Problem To Solve :-) Farley Flud <ff@linux.rocks> - 2024-02-06 21:00 +0000
          Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-06 15:43 -0600
            Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-06 18:19 -0600
              Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-09 10:58 -0600
          Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-06 21:55 -0600
            Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-06 22:06 -0600
        Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-12 01:39 -0600
          Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-14 12:50 -0600
            Re: A Problem To Solve :-) Lester Thorpe <lt@gnu.rocks> - 2024-02-14 20:33 +0000
              Re: A Problem To Solve :-) Athel Cornish-Bowden <me@yahoo.com> - 2024-02-15 11:11 +0100
              Re: A Problem To Solve :-) Physfitfreak <Physfitfreak@gmail.com> - 2024-02-15 13:22 -0600
  Re: A Problem To Solve :-) Arindam Banerjee <banerjeeadda1234@gmail.com> - 2024-02-09 09:47 -0800
    Re: A Problem To Solve :-) Arindam Banerjee <banerjeeadda1234@gmail.com> - 2024-02-12 04:41 -0800

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