A Prime number has only 2 factors which are 1 and itself. 11 and 7 equal 18 when added.
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2 x 3 x 3 = 18
A prime number has only 2 factors which are 1 and itself. 11 and 7 equal 18 when added.
1 and 18 2 and 9 3 and 6
-358
2 + 3 + 13