77777...77777 (83-digits)
This number is a prime.
777 7777777777
7777777777 7777777777 7777777222 7777777777 7777777777 7777777777 7777777777
The largest special wing prime with central number 222, less than a googol. [Loungrides]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell