55555...55551 (609-digits)
This number is a prime.
The third and largest known prime of the form (5)w1. The only others have w = 11 and w = 12.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
The third and largest known prime of the form (5)w1. The only others have w = 11 and w = 12.