what is the greatest common factor of 65 and 91
13 is the greatest common factor of 65 and 91.
So,First, we find the prime factored form (P.F.F.) of 65 and 91.P.F.F. of 65: 5 13P.F.F. of 91: 7 13Find the common numbers1313 = G.C.F.Note: This method works for finding any G.C.F. (find common primes)