5555555555551
This number is a prime.
555 5555555551
The largest non-titanic prime of the form (5)n1, where n is an integer. [Loungrides]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
555 5555555551
The largest non-titanic prime of the form (5)n1, where n is an integer. [Loungrides]