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11668Re: [PrimeNumbers] Re: Isomorphic Numbers

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  • Phil Carmody
    Mar 4, 2003
      --- "jbrennen <jack@...>" <jack@...> wrote:
      > --- In primenumbers@yahoogroups.com, Jack Brennen <jack@b...> wrote:
      > >
      > > There is no run of length 21 below 10^7 (again, subject to the
      > > caveat of only using a probable prime test).
      > >
      >
      > run length 21 -> (15776479..15776499)

      I agree with you on all previous data points, and this one too:
      <<<
      Starting program: /mnt/net/kilospaz/home/phil/projects/maths/primes/conjectures/perry/sumprod 1 21
      [...]
      t=60.450000 b=15728652)

      Breakpoint 4, main (argc=3, argv=0x0) at sumprod.c:108
      (gdb) next
      (gdb)
      (gdb)
      15776479..15776499 is len 21
      >>>

      > No run of length 22 below 2.8*10^7.
      >
      > I'll let it run for a day or so before stopping the search.
      > It's currently extending the search limit by about 14000/second.

      The "t=60.45" means the program took 60.45 seconds of 900MHz Duron.
      I'm currently clocking 200000/s, but expect to slow down as time goes on.

      <<<
      t=89.730000 b=37748755)

      Breakpoint 4, main (argc=3, argv=0x0) at sumprod.c:108
      (gdb) next
      (gdb)
      (gdb)
      38392415..38392436 is len 22
      >>>

      90s, but that run didn't start from 0, but from the len=21 one.

      So I'm looking at the 23 now, hopefully I'll be able to finish my sentence
      before it find one...

      ..., bleh.

      Phil


      =====
      "Only an admission that he does possess weapons of mass destruction
      would do, sources said: 'The rest is just gesture politics." -- Hoon

      "Are you still bombing your wife?" -- Winjer

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