97196...21509 (204-digits)

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

      9719 6795394794 1937929919 9119078878 8388187786 3859857853 8398298278
2382181180 9797787773 7697617577 5174373973 3727719709 7016916836 7767366165
9653647643 6416316196 1761360760 1599593587 5775715695 6355754754 1523521509

The largest prime formed from reverse concatenation of n consecutive 3-digit prime numbers (n=68). [Gupta]