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17742Re: symmetrical primes

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  • thefatphil
    Mar 12, 2006
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      --- In primenumbers@yahoogroups.com, Alan McFarlane
      <alan.mcfarlane@...> wrote:
      > First case of 18 primes:
      > 1613902553 1613902561 1613902567 1613902573 1613902601 1613902621
      > 1613902627 1613902643 1613902649 (1613902650) 1613902651 1613902657
      > 1613902673 1613902679 1613902699 1613902727 1613902733 1613902739
      > 1613902747
      >
      >
      > I can easily do up 2^64-59 for you as well

      Easily? Do you realise how big 2^64 is?

      The above length-18 case may only be 4 GHz seconds of computation
      using a naive algorithm, and going 2^33 times further would imply
      about 2GHz millennia.

      Phil
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