[ January 25, 2001 ]
First, I found a set of three 1001-digit palprimes in arithmetic progression.
Harvey's re-discovery was found after about a 10 hour search on a Pentium III/400.
3 titanic palindromic primes (palprimes)
Second, it occurred to me that while there have been investigations
of palprimes in arithmetic progression I knew of no work on consecutive
palprimes in arithmetic progression. I started an exhaustive search
and rapidly found 3, 4, 5 consecutive palprimes in AP. 6 took longer
but the smallest such set finally appeared. It is shown below.
Several other sets have also been found. So far, no 7-set has been
found, and it may be that an exhaustive search for 7 may not be appropriate.
6 consecutive palindromic primes (palprimes)
Current record [ May 10, 2001 ] see WONplate 99
More on palindromic primes...
| A000090 Prime Curios! Prime Puzzle |
Wikipedia 90 Le Nombre 90 Numberland 90
[ TOP OF PAGE]