1111211111

This number is a prime.

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     1
    1 1
   1 2 1
  1 1 1 1
The smallest triangle-congruent prime.

Submitted: 2008-01-21 19:06:49;   Last Modified: 2008-07-16 09:19:02.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell