31111...11111 (89-digits)
This number is a prime.
311111111 1111111111
1111111111 1111111111 1111111111 1111111111 1111111111 1111111111 1111111111
The largest near-repunit prime p, less than a googol, of
the form p=3111...111. [Loungrides]
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell