This number is a composite.

Single Curio View:   (Seek other curios for this number)
The 2nd repdigit number consisting of 5’s whose the product with all its truncations plus 2 is prime, i.e., 5555*555*55*5+2=847831877. The previous such prime is 55*5+2=277 and the next is 55555555*5555555*…*5+2. [Loungrides]

Submitted: 2018-11-02 09:28:52;   Last Modified: 2018-12-10 14:45:24.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell