The prime factorization of 9 is 3 x 3.
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9 is not a prime. 73 is a prime.
9 is not a prime factor, but it does have one prime factor, which is three. Prime factors are factors of a number that are prime.
Actually, 9 is NOT a prime number.
7 is a prime number but 9 is a composite number
Yes. Both 9 and 11 are prime numbers.