39071...17093 (27-digits)

This number is a prime.

                                               3907145 0509166619 0505417093

390714505091666190505417093 (base 10) = 10 100 001 100 110 001 000 000 111 100 001 100 011 000 111 011 100 011 000 110 000 111 100 000 010 001 100 110 000 101 (base 2) a double decimal/binary palindromic prime. Note that the binary string has a prime length 89. [De Geest]