What is the Greatest Common Factor of 71978 and 71991?

Greatest common factor (GCF) of 71978 and 71991 is 1.

GCF(71978,71991) = 1

We will now calculate the prime factors of 71978 and 71991, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 71978 and 71991.

How to find the GCF of 71978 and 71991?

We will first find the prime factorization of 71978 and 71991. After we will calculate the factors of 71978 and 71991 and find the biggest common factor number .

Step-1: Prime Factorization of 71978

Prime factors of 71978 are 2, 17, 29, 73. Prime factorization of 71978 in exponential form is:

71978 = 2¹ × 17¹ × 29¹ × 73¹

Step-2: Prime Factorization of 71991

Prime factors of 71991 are 3, 19, 421. Prime factorization of 71991 in exponential form is:

71991 = 3² × 19¹ × 421¹

Step-3: Factors of 71978

List of positive integer factors of 71978 that divides 71978 without a remainder.

1, 2, 17, 29, 34, 58, 73, 146, 493, 986, 1241, 2117, 2482, 4234, 35989

Step-4: Factors of 71991

List of positive integer factors of 71991 that divides 71978 without a remainder.

1, 3, 9, 19, 57, 171, 421, 1263, 3789, 7999, 23997

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 71978 and 71991. The biggest common factor number is the GCF number.
So the greatest common factor 71978 and 71991 is 1.

Also check out the Least Common Multiple of 71978 and 71991