37
that is the only number
32 34 36 38 are even, so divide by 2
33 = 11 x 3
35 = 7 x 5
39 = 13 x 3
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The sum of the prime numbers is: 31+37+41+43+47+53+59 = 311
How about: 31+31 = 62
199 31+37+41+43+47=199
5, 7, 31
31, 37 and 41 are all prime numbers