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CC12 records

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  • Jens Kruse Andersen
    CC12 of the 2nd kind, starting at 56 digits: (8428860*127# + 212148902055090) * 2^n + 1, for n = 0..11 It is also record for CC11 - which is what I searched!
    Message 1 of 3 , Feb 8, 2006
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      CC12 of the 2nd kind, starting at 56 digits:
      (8428860*127# + 212148902055090) * 2^n + 1, for n = 0..11

      It is also record for CC11 - which is what I searched!
      The lucky bonus prime improved the record for 12 simultaneous
      primes from 44 to 58 digits:
      http://hjem.get2net.dk/jka/math/simultprime.htm#history12
      The current records for 9, 11, 12 and 13 primes were set
      in fortunate searches for one less prime.

      A more modest record CC12 of the 1st kind, starting at 42 digits:
      (4431659*89# + 440181861259140) * 2^n - 1, for n = 0..11
      This was found earlier and the best overall CC12 at the time.

      The GMP library made prp tests. Marcel Martin's Primo proved all primes.

      And congratulations to Gary Chaffey:
      > I have just found the following record Cunningham Chain (1st Kind) length 5
      >
      > (2^n)*5864262128*1201#-1 For n=0..4

      --
      Jens Kruse Andersen
    • Gary Chaffey
      Congratulations on these records. Sometimes we need a bit of luck when searching for primes. Gary Chaffey Jens Kruse Andersen wrote: CC12
      Message 2 of 3 , Feb 9, 2006
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        Congratulations on these records. Sometimes we need a bit of luck when searching for primes.
        Gary Chaffey

        Jens Kruse Andersen <jens.k.a@...> wrote:
        CC12 of the 2nd kind, starting at 56 digits:
        (8428860*127# + 212148902055090) * 2^n + 1, for n = 0..11

        It is also record for CC11 - which is what I searched!
        The lucky bonus prime improved the record for 12 simultaneous
        primes from 44 to 58 digits:
        http://hjem.get2net.dk/jka/math/simultprime.htm#history12
        The current records for 9, 11, 12 and 13 primes were set
        in fortunate searches for one less prime.

        A more modest record CC12 of the 1st kind, starting at 42 digits:
        (4431659*89# + 440181861259140) * 2^n - 1, for n = 0..11
        This was found earlier and the best overall CC12 at the time.

        The GMP library made prp tests. Marcel Martin's Primo proved all primes.

        And congratulations to Gary Chaffey:
        > I have just found the following record Cunningham Chain (1st Kind) length 5
        >
        > (2^n)*5864262128*1201#-1 For n=0..4

        --
        Jens Kruse Andersen




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      • Dirk Augustin
        Congrats to both of you! I updated the record list in the primenumbers file section. @Jens: Now you had the luck I had before. :) I m curios which record stays
        Message 3 of 3 , Feb 14, 2006
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          Congrats to both of you!

          I updated the record list in the primenumbers file section.

          @Jens:
          Now you had the luck I had before. :)
          I'm curios which record stays longer, your CC12 or my CC9. ;-)

          Regards,
          Dirk


          --- In primenumbers@yahoogroups.com, Gary Chaffey <garychaffey2@...>
          wrote:
          >
          > Congratulations on these records. Sometimes we need a bit of luck
          when searching for primes.
          > Gary Chaffey
          >
          > Jens Kruse Andersen <jens.k.a@...> wrote:
          > CC12 of the 2nd kind, starting at 56 digits:
          > (8428860*127# + 212148902055090) * 2^n + 1, for n = 0..11
          >
          > It is also record for CC11 - which is what I searched!
          > The lucky bonus prime improved the record for 12 simultaneous
          > primes from 44 to 58 digits:
          > http://hjem.get2net.dk/jka/math/simultprime.htm#history12
          > The current records for 9, 11, 12 and 13 primes were set
          > in fortunate searches for one less prime.
          >
          > A more modest record CC12 of the 1st kind, starting at 42 digits:
          > (4431659*89# + 440181861259140) * 2^n - 1, for n = 0..11
          > This was found earlier and the best overall CC12 at the time.
          >
          > The GMP library made prp tests. Marcel Martin's Primo proved all
          primes.
          >
          > And congratulations to Gary Chaffey:
          > > I have just found the following record Cunningham Chain (1st
          Kind) length 5
          > >
          > > (2^n)*5864262128*1201#-1 For n=0..4
          >
          > --
          > Jens Kruse Andersen
          >
          >
          >
          >
          > Unsubscribe by an email to: primenumbers-unsubscribe@yahoogroups.com
          > The Prime Pages : http://www.primepages.org/
          >
          >
          >
          >
          >
          > SPONSORED LINKS
          > Mathematics education Mathematics and computer science
          Number theory
          >
          > ---------------------------------
          > YAHOO! GROUPS LINKS
          >
          >
          > Visit your group "primenumbers" on the web.
          >
          > To unsubscribe from this group, send an email to:
          > primenumbers-unsubscribe@yahoogroups.com
          >
          > Your use of Yahoo! Groups is subject to the Yahoo! Terms of
          Service.
          >
          >
          > ---------------------------------
          >
          >
          >
          >
          >
          > ---------------------------------
          > To help you stay safe and secure online, we've developed the all
          new Yahoo! Security Centre.
          >
          > [Non-text portions of this message have been removed]
          >
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