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Re: PRP Top 50 has become PRP Top 100

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  • d.broadhurst@open.ac.uk
    ... Well Andy Steward has *oodles* of such animals... David
    Message 1 of 9 , May 6, 2001
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      Michael Bell wrote:

      > I think it would be useful if there was a list of PRP's
      > with over 15 or 20% of either N-1 or N+1 factored
      > (or maybe 3*F1+F2>=.6 or so). This would then
      > make a list of primes that it may actually be practical
      > to prove in the not to distant future.
      > Any volunteers for hosting a page?

      Well Andy Steward has *oodles* of such animals...

      David
    • d.broadhurst@open.ac.uk
      PS: My personal gigantic bete noire is Phi(2521,9926), with 10072 digits, and N-1 347 digits short of BLS. As Gollum said, we hates it.... David
      Message 2 of 9 , May 6, 2001
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        PS: My personal gigantic bete noire is Phi(2521,9926),
        with 10072 digits, and N-1 347 digits short of BLS.
        As Gollum said, we hates it.... David
      • Mohale's Hoek TRC
        Guys, Primeform gives the following as PRP 6*k*(2^n - 1 - k ) + 2^n - 1, with n = 4497, k = 8939. digit number = 13400. A beginner in this business, I would
        Message 3 of 9 , May 18, 2001
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          Guys,

          Primeform gives the following as PRP

          6*k*(2^n - 1 - k ) + 2^n - 1, with n = 4497, k = 8939.
          digit number = 13400.

          A beginner in this business, I would like confirmation of this result from
          someone.

          Thank you.

          Peter Lesala.

          -----Original Message-----
          From: Henri LIFCHITZ <HLifchitz@...>
          To: Primes List <PrimeNumbers@yahoogroups.com>
          Date: Friday, April 20, 2001 10:42 PM
          Subject: [PrimeNumbers] PRP Top 50 has become PRP Top 100


          >Hello all,
          >
          >By popular demand, I have decided to extend the PRP Top 50 to a PRP Top
          100.
          >(see http://www.primes.fr.st or
          http://ourworld.compuserve.com/homepages/hlifchitz/ )
          >For convenience reasons, only the first 50 records will keep a specific
          page.
          >
          >Please continue sending me new probable primes (but larger than 12000
          digits).
          >
          >Happy hunting,
          >
          >Henri
          >
          >
          >[Non-text portions of this message have been removed]
          >
          >
          >Unsubscribe by an email to: primenumbers-unsubscribe@egroups.com
          >The Prime Pages : http://www.primepages.org
          >
          >
          >
          >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
          >
          >
          >
        • mikeoakes2@aol.com
          In a message dated 18/05/2001 14:29:21 GMT Daylight Time, ... Hi Peter, Something must be wrong with your expression as (if we do the substitutions for n and
          Message 4 of 9 , May 18, 2001
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            In a message dated 18/05/2001 14:29:21 GMT Daylight Time,
            mohales@... writes:

            > Primeform gives the following as PRP
            > 6*k*(2^n - 1 - k ) + 2^n - 1, with n = 4497, k = 8939.
            > digit number = 13400.
            > A beginner in this business, I would like confirmation of this result from
            > someone.
            > Thank you.
            > Peter Lesala.

            Hi Peter,
            Something must be wrong with your expression as (if we do the substitutions
            for n and k) PFGW says:-
            6*8939*(2^4497-1-8939)+2^4497-1 has factors: 7
            Want to double-check it?
            Mike Oakes
          • Mohale's Hoek TRC
            Hi Mike, There is an error in the value of n = 4497, the value should be n = 44497. Thanks for the quick response. Peter. ... From: Mikeoakes2@aol.com
            Message 5 of 9 , May 20, 2001
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              Hi Mike,

              There is an error in the value of n = 4497, the value should be n = 44497.

              Thanks for the quick response.

              Peter.
              -----Original Message-----
              From: Mikeoakes2@... <Mikeoakes2@...>
              To: mohales@... <mohales@...>
              Cc: PrimeNumbers@yahoogroups.com <PrimeNumbers@yahoogroups.com>
              Date: Friday, May 18, 2001 10:03 PM
              Subject: Re: [PrimeNumbers] PRP Top 50 has become PRP Top 100


              In a message dated 18/05/2001 14:29:21 GMT Daylight Time,
              mohales@... writes:

              > Primeform gives the following as PRP
              > 6*k*(2^n - 1 - k ) + 2^n - 1, with n = 4497, k = 8939.
              > digit number = 13400.
              > A beginner in this business, I would like confirmation of this result from
              > someone.
              > Thank you.
              > Peter Lesala.

              Hi Peter,
              Something must be wrong with your expression as (if we do the substitutions
              for n and k) PFGW says:-
              6*8939*(2^4497-1-8939)+2^4497-1 has factors: 7
              Want to double-check it?
              Mike Oakes
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