Question: what is the greatest common factor between 44 and 77?
Answer: The prime factorization of 44 is: 2 x 2 x 11.
The prime factorization of 77 is: 7 x 11.
The prime factors and multiplicities 44 and 77 have in common are: 11.
11 is the gcf of 44 and 77.
gcf(44,77) = 11.