- 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?

Thanks,

Zak

Please email me:

seidovzf@... - Zak Seidov wrote:

> For n up to 3,000,000,

b) in http://www.primepuzzles.net/puzzles/puzz_051.htm asks for the next.

> 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?

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