It is a composite number because it has more than two factors
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Composite.
89 is prime, the others composite.
21, 55, 77, and 93 are composite numbers. 23 is a prime.
83 is a prime number, as its only factors are 1 and 83. 93 is composite, as its factors are 1, 3, 31 and 93.
Oh, dude, 93 is a composite number. It's like a big ol' party with more than just itself and 1 showing up. You know, factors like 3 and 31 are totally crashing the prime number party for 93. So, yeah, 93 is definitely not a prime number.