57 is divisible by 3 so it is composite. A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1, 2, and 0. 1, 2, and 0 have a different name.
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In math, there are two types of numbers: prime and composite. A number is prime if it has no factors other than 1 and itself. 57 is composite, because it has two factors, 19 and 3. 19x3=57
composite
composite
it is composite.
It is composite