29, 47
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29 and 47 are prime numbers because they have only two factors which are themselves and one.
It is: 29+3 = 32
They are: 23, 29 and 31
23 29 31.
The prime numbers up to 32 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 and 31