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Re: [PrimeNumbers] Re: Primo for multi-core Gnu/Linux

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  • Nathan Russell
    I m currently uing it to test the first unproven n!6-2 number, which I hope to take about a day on my dual core laptop. Nathan On Sat, May 21, 2011 at 1:56 PM,
    Message 1 of 5 , May 23 11:59 AM
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      I'm currently uing it to test the first unproven n!6-2 number, which I hope
      to take about a day on my dual core laptop.

      Nathan

      On Sat, May 21, 2011 at 1:56 PM, paulunderwooduk <paulunderwood@...
      > wrote:

      >
      >
      >
      >
      > --- In primenumbers@yahoogroups.com, Norman Luhn <n.luhn@...> wrote:
      > >
      > > For testing , I had have install UBUNTU 11 on a seperate HDD . It works
      > fine.�
      >
      > > A 2000 digit number was done in 45 min. A 1000 digit 5 min.
      > > I think it is 4-6 times ( using 6 cores ) faster than v3.09, but the
      > power law x=4..5 is the same.
      > >
      > > Unfortunately , there don't exist a windows version.
      > >
      > > Norman�
      > >
      >
      > I have just tested (2^3539+1)/3 :
      > http://primes.utm.edu/primes/page.php?id=54344
      >
      > With "Max concurrent tasks" set to 4 it proved the number prime in 722
      > seconds. I notice that CPU usage was light... so I tried again with the
      > setting at 8, but the time was longer at 750 seconds. Phase 2 is CPU
      > intensive!
      >
      > Paul
      >
      > > ________________________________
      > > Von: paulunderwooduk <paulunderwood@...>
      >
      > > An: primenumbers@yahoogroups.com
      > > Gesendet: 19:03 Samstag, 21.Mai 2011
      > > Betreff: [PrimeNumbers] Primo for multi-core Gnu/Linux
      > >
      > >
      > > �
      > > Hi,
      > >
      > > I have just now seen that there is an "alpha" version of Primo for linux
      > which supports multi-core computers. I hope to see some results using this
      > program soon ;-)
      > >
      > > May 9, 2011 http://www.ellipsa.eu/
      > >
      > > Paul
      > >
      > >
      > >
      > >
      > > [Non-text portions of this message have been removed]
      > >
      >
      >
      >


      [Non-text portions of this message have been removed]
    • Nathan Russell
      ... Nathan [Non-text portions of this message have been removed]
      Message 2 of 5 , May 26 3:49 PM
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        >
        > Has anyone experimented with the "trial division bound", or found rules of
        > thumb for setting it?
        >

        Nathan


        [Non-text portions of this message have been removed]
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