Yes
You do a factor rainbow to find a prime factorization. You compare prime factorizations to find a greatest common factor.
The Greatest Common Factor (GCF) is: 12
The only factor they have in common is 1. It has to be the greatest.
The greatest common factor (GCF) is 5.
The greatest common factor (GCF) is 4.
The greatest common factor (GCF) is 3.
The greatest common factor (GCF) is 2.
There is no Greatest Common Factor (GCF) for a single number. The Greatest Common Factor (GCF) is the largest factor common to two or more given numbers.
You do not necessarily need the common prime factors when finding the greatest common factor, but with large numbers or numbers for which you cannot easily determine all the factors, using prime factorization to determine the greatest common factor is the easiest method. The greatest common factor can then be determined by multiplying the common prime factors together. For example, when trying to find the greatest common factor of 2144 and 5672, finding all their possible factors to compare could be difficult. So, it is easier to find their prime factors, determine the prime factors they have in common, and then multiply the common prime factors to get the greatest common factor. For descriptions and examples of finding the greatest common factor, see the "Related Questions" links below.
The greatest common factor (GCF) is 25.
the greatest common factor of 8a3b2 and 12ab4 is 24a3b4
The greatest common factor (GCF) is 5.