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17749Re: [PrimeNumbers] Re: symmetrical primes

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  • Alan McFarlane
    Mar 12 3:24 PM
      Good one Phil, well spotted!

      I admit to making a couple of minor blunders in my code, but I've
      rewritten it now - hopefully it works.

      I'm working on block #3, current results as follows:

      C:\Documents and Settings\Alan\My Documents\Work in Progress\ssop>ssop 3
      [2006-03-12 22:22:57] Initializing
      [2006-03-12 22:22:57] Processing block #3 (2199023255552-3298534948863)
      [2006-03-12 22:22:57] Found a sequence of 2 primes starting at
      2199023255579 with offsets from 2199023255598 of plus and minus
      [2006-03-12 22:22:57] 19
      [2006-03-12 22:22:57] Found a sequence of 4 primes starting at
      2199023256557 with offsets from 2199023256585 of plus and minus
      [2006-03-12 22:22:57] 16 28
      [2006-03-12 22:22:57] Found a sequence of 6 primes starting at
      2199023258429 with offsets from 2199023258454 of plus and minus
      [2006-03-12 22:22:57] 5 23 25
      [2006-03-12 22:22:57] Found a sequence of 8 primes starting at
      2199023370119 with offsets from 2199023370141 of plus and minus
      [2006-03-12 22:22:57] 2 8 20 22
      [2006-03-12 22:22:58] Found a sequence of 10 primes starting at
      2199027144263 with offsets from 2199027144381 of plus and minus
      [2006-03-12 22:22:58] 62 70 82 92 118
      [2006-03-12 22:23:06] Found a sequence of 12 primes starting at
      2199128142049 with offsets from 2199128142126 of plus and minus
      [2006-03-12 22:23:06] 17 35 53 67 73 77
      [2006-03-12 22:26:31] Found a sequence of 14 primes starting at
      2201711786839 with offsets from 2201711786988 of plus and minus
      [2006-03-12 22:26:31] 5 41 71 95 125 145 149
      [2006-03-12 22:28:06] Found a sequence of 16 primes starting at
      2202939530537 with offsets from 2202939530610 of plus and minus
      [2006-03-12 22:28:06] 1 41 43 47 53 59 67 73
      [2006-03-12 23:24:00] ...

      I don't know when it will finish, as I'm testing for sequences up to 80
      in length, but hopefully it should be in another couple of hours or so.

      This is a slow machine - AMD Athlon 1.25 GHz, but I'm not running
      anything else too heavy on it. (ssop is getting around 90% of processor
      time allocated to it).



      Phil Carmody wrote:
      > --- Alan McFarlane <alan.mcfarlane@...> wrote:
      >> I'll test my code on Block #3
      >>
      >> Block 1 : (0 * 240) .. (1 * 240) - completed (18 digits found) [AM/PC]
      >> Block 2 : (1 * 240) .. (2 * 240) - reserved PC
      >> Block 3 : (2 * 240) .. (3 * 240) - reserved AM
      >
      > Looks like you stopped to soon first time - the whole block took 2hrs on the
      > 2GHz Athlon.
      >
      >
      > 1797595815167
      > 1797595815157 +10
      > 1797595815133 +24
      > 1797595815109 +24
      > 1797595815091 +18
      > 1797595815089 +2
      > 1797595815079 +10
      > 1797595815053 +26
      > 1797595815019 +34
      > 1797595815017 +2
      > 1797595815013 +4
      > 1797595815011 +2
      > 1797595814977 +34
      > 1797595814951 +26
      > 1797595814941 +10
      > 1797595814939 +2
      > 1797595814921 +18
      > 1797595814897 +24
      > 1797595814873 +24
      > 1797595814863 +10
      >
      > Phil
      >
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