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Re: [PrimeNumbers] Re: Puzzle: Sphenic chain by factor concatenation

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  • Kevin Acres
    Hi David, ... Well done for that. Its been windy here and wind = power outage where I live :-) One day I ll get a decent size UPS. Best Regards, Kevin.
    Message 1 of 16 , Jun 20, 2011
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      Hi David,

      At 02:20 PM 21/06/2011, djbroadhurst wrote:

      >--- In primenumbers@yahoogroups.com,
      >"djbroadhurst" <d.broadhurst@...> wrote:
      >
      > > The best I can do at present is length 108
      >
      >Length 109 is achieved by
      >
      > {sphen109 = [114,
      > 3, 6, 6, 3, 2, 2, 4, 4, 3, 4, 1, 6, 1, 4, 1, 3, 2, 3, 2, 6,
      > 1, 6, 3, 5, 5, 6, 2, 1, 6, 6, 6, 1, 2, 5, 4, 3, 5, 2, 5, 2,
      > 4, 1, 5, 1, 6, 5, 3, 3, 5, 5, 2, 1, 5, 5, 1, 6, 4, 5, 5, 3,
      > 5, 2, 4, 4, 4, 3, 4, 5, 6, 4, 6, 5, 6, 2, 1, 1, 6, 6, 5, 6,
      > 6, 4, 6, 6, 2, 4, 4, 6, 6, 2, 5, 3, 1, 2, 2, 1, 2, 2, 4, 3,
      > 1, 4, 3, 1, 2, 5, 3, 5];}

      Well done for that. Its been windy here and "wind = power outage"
      where I live :-)

      One day I'll get a decent size UPS.


      Best Regards,

      Kevin.
    • djbroadhurst
      ... The current record is length 112, achieved by {sphen112a = [114, 3, 6, 6, 3, 2, 2, 1, 3, 3, 2, 2, 1, 5, 2, 3, 2, 1, 6, 4, 4, 2, 4, 4, 2, 5, 4, 2, 3, 4, 2,
      Message 2 of 16 , Jun 23, 2011
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        --- In primenumbers@yahoogroups.com,
        Kevin Acres <research@...> wrote:

        > > {sphen109 = [114,
        ....
        > Well done for that. Its been windy here and "wind = power outage"
        > where I live :-)

        The current record is length 112, achieved by

        {sphen112a = [114,
        3, 6, 6, 3, 2, 2, 1, 3, 3, 2, 2, 1, 5, 2, 3, 2, 1, 6, 4, 4,
        2, 4, 4, 2, 5, 4, 2, 3, 4, 2, 1, 3, 3, 6, 5, 4, 3, 1, 5, 4,
        2, 5, 1, 1, 3, 4, 5, 5, 5, 5, 6, 3, 6, 1, 6, 1, 4, 3, 1, 6,
        4, 6, 3, 1, 3, 2, 1, 2, 2, 6, 3, 2, 3, 5, 4, 6, 6, 5, 2, 2,
        2, 3, 4, 6, 5, 2, 3, 3, 2, 6, 5, 1, 2, 6, 1, 4, 3, 5, 3, 3,
        3, 4, 1, 4, 2, 2, 1, 2, 6, 3, 2];}

        {sphen112b = [114,
        3, 6, 6, 3, 2, 2, 1, 3, 3, 2, 2, 1, 5, 2, 3, 2, 1, 6, 4, 4,
        2, 4, 4, 2, 5, 4, 2, 3, 4, 2, 1, 3, 3, 6, 5, 4, 3, 1, 5, 4,
        2, 5, 1, 1, 3, 4, 5, 5, 5, 5, 6, 3, 6, 1, 6, 1, 4, 3, 1, 6,
        4, 6, 3, 1, 3, 2, 1, 2, 2, 6, 3, 2, 3, 5, 4, 6, 6, 5, 2, 2,
        2, 3, 4, 6, 5, 2, 3, 3, 2, 6, 5, 1, 2, 6, 1, 4, 3, 2, 3, 3,
        4, 2, 2, 3, 2, 2, 1, 4, 5, 1, 1];}

        with input and output in
        http://physics.open.ac.uk/~dbroadhu/cert/sphen112.gp
        http://physics.open.ac.uk/~dbroadhu/cert/sphen112.txt

        David
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