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15x2=30
28 7, 4, 2
30 is composite: It has more than 2 factors: 1, 2, 3, 5, 6, 10, 15, 30. The nearest 2 prime numbers are 29 and 31.
46
Well, a composite number is a composite number because it has more than two factors. For example, the number 2 is Prime because it ONLY has 2 factors, which is 2 and 1. Another example is that 30 is a Composite number because it has MORE than 2 factors which are 1, 30, 6, and 5.