11111...11111 (100-digits)
This number is a prime.
1111111111 1111111111 1111111111
1111111111 1111111111 1111111111 1111111111 1111111111 1121111111 1111111111
The smallest near repdigit prime with 100 digits. Note the sum of digits is prime also. [Patterson]
(There is one curio for this number that has not yet been approved by an editor.)
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell