Question: what is the greatest common factor of 48 and 60 using prime factorization?
Answer: The prime factorization of 60 is: 2 x 2 x 3 x 5. The prime factors and multiplicities 48 and 60 have in common are: 2 x 2 x 3. 2 x 2 x 3 is the gcf of 48 and 60. gcf(48,60) = 12.