11111...11133 (715-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

+ The smallest prime in the sequence 33, 133, 1133, 11133, 111133, 1111133, 11111133, etc. [Bajpai]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell