2 is prime.
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A composite number is any whole number that isn't a prime number or 1. A prime number is a whole number that is only divisible by itself and 1.
If the prime factorizations have no prime factors in common, the numbers are relatively prime.
Use the prime factorizations to determine the GCF. If the GCF is 1, the numbers are relatively prime. If the two numbers have no prime factors in common, they are relatively prime.
If the prime factorizations contain no factors in common (their GCF is 1), the numbers are relatively prime.
1 and 0 are neither composite or prime numbers