13315146811210211749

This number is a prime.

1331514681 1210211749

The emirp formed by concatenating the sequence 13, 3, 15, 14, 6, 8, 1, 12, 10, 2, 11, 7, 4, 9 derived from a "row-wise" unicursal path through the entire entries (excepting the final 5) of the unique (ignoring reflection) 5-th order difference table consisting of the first 15 natural numbers:

           13    3    15  14   6
              10   12    1   8
                 2    11   7 
                    9    4
                       5

[Beedassy]