131459

This number is a composite.

Single Curio View:   (Seek other curios for this number)
The smallest semiprime such that all permutations of concatenations with its factors are prime, i.e., 131459 = 47 * 2797 and 471314592797, 279713145947, 131459472797, 131459279747, 472797131459, 279747131459 are all primes. [Sariyar]

Submitted: 2020-06-09 21:51:39;   Last Modified: 2020-06-09 22:05:40.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell