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

Re: [PrimeNumbers] Palindromic prime pi(n) of palindromic prime n

Expand Messages
  • Jens Kruse Andersen
    ... b) in http://www.primepuzzles.net/puzzles/puzz_051.htm asks for the next. It reports exhaustive searching found 3 cases with palindromic composite pi(n):
    Message 1 of 2 , Feb 2, 2005
    • 0 Attachment
      Zak Seidov wrote:

      > For n up to 3,000,000,
      > there are only 3 cases of
      > palindromic prime pi(n) of palindromic prime n:
      > n=3,5,11, with pi(n)=2,3,5.
      > Can anyone find other cases?

      b) in http://www.primepuzzles.net/puzzles/puzz_051.htm asks for the next.
      It reports exhaustive searching found 3 cases with palindromic composite
      pi(n):
      pi(11) = 5
      pi(143787341) = 8114118
      pi(11853735811) = 535252535 (found by Giovanni Resta)

      --
      Jens Kruse Andersen
    Your message has been successfully submitted and would be delivered to recipients shortly.