Loading ...
Sorry, an error occurred while loading the content.
 

factorial record!

Expand Messages
  • paulunderwooduk
    Hi, congratulation are in order for René Dohmen for discovering the biggest yet, 712355 digit factorial prime 150209!+1:
    Message 1 of 6 , Oct 31, 2011
      Hi,

      congratulation are in order for René Dohmen for discovering the biggest yet, 712355 digit factorial prime 150209!+1:
      http://primes.utm.edu/primes/page.php?id=102627

      and for beating PrimeGrid in discovering it! I wonder if there are more plus 1 factorial primes between it and PrimeGrid's 110059!+1.

      http://primes.utm.edu/top20/page.php?id=30

      Paul
    • paulunderwooduk
      ... PrimeGrid s http://primes.utm.edu/primes/page.php?id=100445 (110059!+1) took 2.16 days to be verfied by PP. Any guesses for the ETA of René s amazing
      Message 2 of 6 , Oct 31, 2011
        --- In primenumbers@yahoogroups.com, "paulunderwooduk" <paulunderwood@...> wrote:
        >
        > Hi,
        >
        > congratulation are in order for René Dohmen for discovering the biggest yet, 712355 digit factorial prime 150209!+1:
        > http://primes.utm.edu/primes/page.php?id=102627
        >
        > and for beating PrimeGrid in discovering it! I wonder if there are more plus 1 factorial primes between it and PrimeGrid's 110059!+1.
        >

        PrimeGrid's http://primes.utm.edu/primes/page.php?id=100445 (110059!+1) took 2.16 days to be verfied by PP. Any guesses for the ETA of René's amazing find?

        Paul
      • paulunderwooduk
        ... and a further 12 hours for trial division! Paul
        Message 3 of 6 , Oct 31, 2011
          --- In primenumbers@yahoogroups.com, "paulunderwooduk" <paulunderwood@...> wrote:
          >
          >
          >
          > --- In primenumbers@yahoogroups.com, "paulunderwooduk" <paulunderwood@> wrote:
          > >
          > > Hi,
          > >
          > > congratulation are in order for René Dohmen for discovering the biggest yet, 712355 digit factorial prime 150209!+1:
          > > http://primes.utm.edu/primes/page.php?id=102627
          > >
          > > and for beating PrimeGrid in discovering it! I wonder if there are more plus 1 factorial primes between it and PrimeGrid's 110059!+1.
          > >
          >
          > PrimeGrid's http://primes.utm.edu/primes/page.php?id=100445 (110059!+1) took 2.16 days to be verfied by PP. Any guesses for the ETA of René's amazing find?

          and a further 12 hours for trial division!

          Paul
        • kraDen
          Congratulations Rene I notice it is ranked at 73rd Coincidentally when I found the prime 26951!+1 (107707 digits) in 2002 its entrance rank was also 73 How
          Message 4 of 6 , Nov 2, 2011
            Congratulations Rene

            I notice it is ranked at 73rd
            Coincidentally when I found the prime 26951!+1 (107707 digits) in 2002 its entrance rank was also 73
            How times change.

            cheers
            Ken

            --- In primenumbers@yahoogroups.com, "paulunderwooduk" <paulunderwood@...> wrote:
            >
            > Hi,
            >
            > congratulation are in order for René Dohmen for discovering the biggest yet, 712355 digit factorial prime 150209!+1:
            > http://primes.utm.edu/primes/page.php?id=102627
            >
            > and for beating PrimeGrid in discovering it! I wonder if there are more plus 1 factorial primes between it and PrimeGrid's 110059!+1.
            >
            > http://primes.utm.edu/top20/page.php?id=30
            >
            > Paul
            >
          • kraDen
            ... 10 years ago 21480!-1 (which has 83727 digits) took over 5 days for me to prove prime on what was an up to date machine at the time. So I d guess a week
            Message 5 of 6 , Nov 2, 2011
              --- In primenumbers@yahoogroups.com, "paulunderwooduk" <paulunderwood@...> wrote:
              >
              >
              >
              > --- In primenumbers@yahoogroups.com, "paulunderwooduk" <paulunderwood@> wrote:
              > >
              > > Hi,
              > >
              > > congratulation are in order for René Dohmen for discovering the biggest yet, 712355 digit factorial prime 150209!+1:
              > > http://primes.utm.edu/primes/page.php?id=102627
              > >
              > > and for beating PrimeGrid in discovering it! I wonder if there are more plus 1 factorial primes between it and PrimeGrid's 110059!+1.
              > >
              >
              > PrimeGrid's http://primes.utm.edu/primes/page.php?id=100445 (110059!+1) took 2.16 days to be verfied by PP. Any guesses for the ETA of René's amazing find?

              10 years ago 21480!-1 (which has 83727 digits) took over 5 days for me to prove prime on what was an up to date machine at the time.
              So I'd guess a week

              Cheers
              Ken
              >
              > Paul
              >
            • paulunderwooduk
              ... It s official: Command: /home/caldwell/client/pfgw -t -q 150209!+1 2 &1 PFGW Version 3.4.5.32BIT.20110215.x86_Dev [GWNUM 26.5] Primality testing 150209!+1
              Message 6 of 6 , Nov 3, 2011
                --- In primenumbers@yahoogroups.com, "kraDen" <kradenken@...> wrote:
                >
                >
                >
                > --- In primenumbers@yahoogroups.com, "paulunderwooduk" <paulunderwood@> wrote:
                > >
                > >
                > >
                > > --- In primenumbers@yahoogroups.com, "paulunderwooduk" <paulunderwood@> wrote:
                > > >
                > > > Hi,
                > > >
                > > > congratulation are in order for René Dohmen for discovering the biggest yet, 712355 digit factorial prime 150209!+1:
                > > > http://primes.utm.edu/primes/page.php?id=102627
                > > >
                > > > and for beating PrimeGrid in discovering it! I wonder if there are more plus 1 factorial primes between it and PrimeGrid's 110059!+1.
                > > >
                > >
                > > PrimeGrid's http://primes.utm.edu/primes/page.php?id=100445 (110059!+1) took 2.16 days to be verfied by PP. Any guesses for the ETA of René's amazing find?
                >
                > 10 years ago 21480!-1 (which has 83727 digits) took over 5 days for me to prove prime on what was an up to date machine at the time.
                > So I'd guess a week
                >

                It's official:
                Command: /home/caldwell/client/pfgw -t -q"150209!+1" 2>&1
                PFGW Version 3.4.5.32BIT.20110215.x86_Dev [GWNUM 26.5]
                Primality testing 150209!+1 [N-1, Brillhart-Lehmer-Selfridge]
                Running N-1 test using base 150211
                Running N-1 test using base 150217
                Calling Brillhart-Lehmer-Selfridge with factored part 33.45%
                150209!+1 is prime! (240480.6224s+2.6547s)
                [Elapsed time: 2.78 days]

                plus 16.454 hours of trial division.

                Well done René!

                Paul
              Your message has been successfully submitted and would be delivered to recipients shortly.