11251...15211 (1345-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

Just showing those entries submitted by 'Gupta': (Click here to show all)

The bottom row of a palindromic prime pyramid of odd primes (starting with 3) of step size 4 and height 169, where each palindromic prime p is the smallest p containing p in the above row. [Gupta]