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Re: Puzzle: Sphenic chain by factor concatenation

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  • 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 1 of 16 , Jun 23, 2011
    • 0 Attachment
      --- 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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