1111001101011001111

This number is a prime.

                                                        111100110 1011001111

+ 

       1 1 1
      1 0 0 1
     1 0 1 0 1
      1 0 0 1
       1 1 1
The smallest centered hexagonal-congruent prime of order 3. [Hartley]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell