52 is composite. You need at least two numbers to find a GCF.
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It's even. It must be composite.
One
52 is composite. 2 x 2 x 13 = 52
Any two composite numbers who do not share the same prime factors.15 = 5x322 = 11x2So 15 and 22 have a GCF of 1
52 is an even number greater than 2. It is composite. 79 has only two factors: 1 and itself. It is prime.