This number is a prime.

                                                             1379 1315212531

Single Curio View:   (Seek other curios for this number)
All the emirps formed from the concatenation of the first consecutive lucky numbers begin with 13, the smallest (lucky) emirp with this property. We are lucky because 13791315212531 is the only known case ending with the reversal of 13. [Capelle]

Submitted: 2009-05-13 15:07:04;   Last Modified: 2009-05-13 16:38:32.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell