1111001101011001111

This number is a prime.

                                                        111100110 1011001111

Just showing those entries submitted by 'Hartley': (Click here to show all)

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       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]

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