33232...34971 (123-digits)

This number is a prime.

                  332 3293056960 1474756150 9943678223 0728499688 9010407138
4128720119 7732674328 2475249403 5360757648 0182354311 7649168072 4013434971

This prime number is attained by concatenating the first 17 powers of 7 in reverse order. Note that 17 is itself the concatenation of the first 2 powers of 7. [Hartley]