38273...37283 (6157-digits)

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

A palindromic prime constructed around a central three-digit palindromic prime, namely 919, and extended to the right with consecutive primes up to 7283 and to the left extended with the mirror image of this right extended concatenation. [Raghuramaiah]