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.