12345...54321 (3111-digits)
This number is a prime.
12345654320*(10^3110-1)/(10^10-1)+1 is a palindromic prime with peak and valley pattern. [Broadhurst]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
12345654320*(10^3110-1)/(10^10-1)+1 is a palindromic prime with peak and valley pattern. [Broadhurst]