Question: what is the greatest common factor in 24 and 22?
Answer: The prime factorization of 22 is: 2 x 11.
The prime factorization of 24 is: 2 x 2 x 2 x 3.
The prime factors and multiplicities 22 and 24 have in common are: 2.
2 is the gcf of 22 and 24.
gcf(22,24) = 2.