9999999
This number is a composite.
The only 7-digit repdigit number such that the product of itself and all of its truncations plus 2 is prime. [Loungrides]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a composite.
The only 7-digit repdigit number such that the product of itself and all of its truncations plus 2 is prime. [Loungrides]