1971179391939711791

This number is a prime.

                                                        197117939 1939711791

A palindromic carousel (or merry-go-round) prime, i.e., for each digit 1->3->7->9->1: 9739937179717399379-> 1971179391939711791-> 3193391713171933913-> 7317713937393177137 ->. Found by Michael Bell, 2001. [Rivera]