Products of prime numbers are composite numbers.
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The products of a square of a prime and a prime, like 12.
No because 13x2=26 and they're both prime
We are sometimes asked to rewrite a composite number as a product of its prime factorization. That's redundant, since a prime factorization is a product by definition. The (product of the) prime factorization of 36 is 2 x 2 x 3 x 3.
Any two prime numbers will be relatively prime. Numbers are relatively prime if they do not have any prime factors in common. Prime numbers have only themselves as prime factors, so all prime numbers are relatively prime to the others.
The opposite of prime numbers are composite numbers.