84

This number is a composite.

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The smallest number that can be written in four ways as the sum of a set of four distinct primes such that the sum of any three terms in each set is prime: {5, 13, 23, 43}, {11, 13, 17, 43}, {11, 13, 23, 37}, {13, 17, 23, 31}. [Loungrides]

Submitted: 2016-05-19 13:47:10;   Last Modified: 2016-07-10 11:56:32.
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