72

This number is a composite.

Just showing those entries submitted by 'Honaker': (Click here to show all)

The smallest number that can be written in two ways as the sum of a set of four distinct primes such that the sum of any three in either set is prime: {5, 11, 13, 43} and {11, 13, 19, 29}. [Honaker , Noe , Porter]