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.
All prime numbers have a common factor of 1.
Prime numbers have one distinct prime factor.
Prime numbers.
Since prime numbers only have one prime factor (themselves), factor trees are unnecessary.
30 has three prime numbers and is a factor of 60.
Not a lot. They're both prime numbers. A factor that is prime is used to make other numbers.
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.
Factor strings don't necessarily have to be composed entirely of prime numbers. But the longest factor string, the one that is entirely prime numbers, that's the prime factorization.
Prime numbers and numbers that are relatively prime.
Five is prime and a factor of both numbers.
Prime numbers