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p and 10^n+p both Primes

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  • miltbrown@earthlink.net
    An interesting extension of Patrick De Geest s Table is where 10^n+p and p are both prime (the first instance) The table begins: n---------p =============
    Message 1 of 2 , Jul 1, 2007
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      An interesting extension of Patrick De Geest's Table
      is where 10^n+p and p are both prime (the first instance)

      The table begins:

      n---------p
      =============
      1---------3
      2---------3
      3---------13 ++
      4---------7
      5---------3 ++

      6---------3
      7---------19 ++
      8---------7
      9---------7
      10--------19

      11--------3 ++
      12--------61
      13--------37 ++
      14--------283
      15--------37

      16--------61
      17--------3 ++
      18--------3
      19--------97 ++
      20--------151

      Also, where n is prime, as marked ++ above.

      Milton L. Brown
    • Dirk Augustin
      ... Patrick already has a list where 10^n-p1, 10^n+p2, n, p1 and p2 are all prime on his page http://www.worldofnumbers.com/index.html . Just search for
      Message 2 of 2 , Jul 5, 2007
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        --- In primenumbers@yahoogroups.com, miltbrown@... wrote:
        >
        > An interesting extension of Patrick De Geest's Table
        > is where 10^n+p and p are both prime (the first instance)
        >

        Patrick already has a list where 10^n-p1, 10^n+p2, n, p1 and p2 are all
        prime on his page http://www.worldofnumbers.com/index.html . Just
        search for "Exponent, -y and +y simultaneously prime" on the page.

        Regards,
        Dirk
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