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Re: [PrimeNumbers] a puzzle

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  • Ali Adams
    Greeting Jens,   Are they the same kind of 7 primes all ending in 9 (I think you gave me few weeks back)?
    Message 1 of 10 , May 24 8:01 AM
      Greeting Jens,
       
      Are they the same kind of 7 primes all ending in 9 (I think you gave me few weeks back)?
       11108195956680805165653650502135350605769090617575464617311539
      11108195956680805165653650502135350605769090617575464617311599
      11108195956680805165653650502135350605769090617575464617311649
      11108195956680805165653650502135350605769090617575464617311659
      11108195956680805165653650502135350605769090617575464617311739
      11108195956680805165653650502135350605769090617575464617311949
      11108195956680805165653650502135350605769090617575464617311989

      Althought I found the middle prime * 7 from my 2012 research, I still don't understand what is their secret?
       
      Anyone can shed a light please?
       
      Thank you all.
       
      Ali
      God > infinity
      www.primalogy.com

       



      ________________________________
      From: Jens Kruse Andersen <jens.k.a@...>
      To: primenumbers@yahoogroups.com
      Sent: Mon, May 24, 2010 10:16:43 PM
      Subject: Re: [PrimeNumbers] a puzzle

       
      Andrey Kulsha wrote:
      > Let f(x) be a quadratic polynomial with integer coefficients:
      >
      > f(x) = ax^2+bx+c

      For an arbitrary quadratic it's trivial to find 7 primes with a
      brute force search of small coefficients. Here is a double:
      f(x) = 2*x^2+36*x-37 starting at p=5 or p=73.

      --
      Jens Kruse Andersen






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