41210198642357111317

This number is a prime.

                                                       4121019864 2357111317

The smallest prime formed by reflecting the reversals of first n composite numbers to the left with the same number of primes to the right. Here, n = 7. The sequence of n that produce primes begins 7, 9, 18, 56, ... . Can you find a larger example? [Sariyar]