12222...22221 (81-digits)

This number is a prime.

                                                                1 2222222121
2222212221 2221222221 2122222221 2222222121 2222212221 2221222221 2122222221

Single Curio View:   (Seek other curios for this number)
The only X-prime of order 9. [Loungrides]

Submitted: 2009-08-27 10:29:38;   Last Modified: 2014-08-30 10:16:45.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell