111 = 3*37
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prime factors for 111 = 3, 37
As a product of its prime factors: 3*37 = 111
113 is a prime number. 111 and 115 are composites.
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A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 81 is composite, 111 is prime.