2 and 3 are prime numbers that are factors of 12. There is an infinite list of prime numbers that aren't.
All numbers have factors. Some numbers have some of the same factors as other numbers. These are common factors. If the factor is a prime number, it is a common prime factor. 3 is a prime number. 3 is a factor of 9. 3 is a factor of 12. 3 is a common prime factor of 9 and 12.
1 and 3
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.
it means to find out if the number is composite or prime
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.
6 and 12
Since 12 is a factor of 24, all of its factors, prime or otherwise, are common.
All numbers have factors. Some factors are prime numbers. A prime factor is a factor that is a prime number. A common prime factor is a prime factor that appears on the list of factors of two or more given numbers.
12 is a composite number, not a prime factor.
Two numbers are relatively prime if the only factor they have in common is 1. Example: 12 and 17 are relatively prime because they have only 1 as a common factor. 12 and 21 are not relatively prime because they have 1 and 3 as common factors.
Their only common factor is 1. They each have a repeated prime factor.