67

This number is a prime.

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The sum of all idoneal primes. (A positive integer m is idoneal if and only if it cannot be written as ab + bc + ac for integer a, b, and c with 0 < a < b < c.) [Loungrides]

Submitted: 2008-12-31 11:09:16; Last Modified: 2009-03-02 02:07:56.