12121...12121 (627-digits)
This number is a prime.
Single Curio View: (Seek other curios for this number)
The smallest prime formed by alternating ones and twos with a composite number of digits. [Gallardo]
Submitted: 0000-00-00 00:00:00; Last Modified: 2008-01-30 17:28:00.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell