31 is a Prime number because it is only divisible by 1 and itself. If it was divisible by any other number besides 1 and itself, then it would be a composite number.
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because it doesnt have at least two numbers
31 is prime. 32 and 33 are composite.
31 is prime.
31 is prime.
Prime; Are, 2,3,5,7,11,13,17,19,23,29