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A composite factor is a factor that is a composite number, as opposed to a prime factor which is a factor that is a prime number.
All numbers have factors. Some factors are prime numbers. These are known as prime factors. Some numbers have some of the same prime factors as other numbers. These are known as common prime factors. 3 is a common prime factor of 12 and 15.
12 is a multiple of 3. It is not a factor of 6. 6 is a factor of 12.
The prime factorization of 36 is 2 x 2 x 3 x 3The prime factorization of 12 is 2 x 2 x 3
The GCF of 12 and 75 is 3.The prime factorization of 12 is 2*2*3.The prime factorization of 75 is 3*5*5Their greatest common factor is 3.