7284717174827

This number is a prime.

                                                              728 4717174827

7284717174827 (base 10) = 1101010000000011010111110101100000000101011 (base 2). The decimal string has prime length 13 and the binary string is of prime length 43. The binary string when interpreted as a base 10 number remains a palindromic prime as well! [De Geest]