The number 23 is a Prime number. It has only 1 and 23 as its factors.
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Any integer greater than 1 must by prime or composite - it cannot be neither. 23 is prime.
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. 23 is prime.
It is a composite.
529 is not prime. 529 = 23 * 23
23 is prime because its only factors are 1 and itself.
15 is composite number 17, 19 and 23 are prime numbers.
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. 23452 is composite.