What is the Greatest Common Factor of 71978 and 71990?

Greatest common factor (GCF) of 71978 and 71990 is 2.

GCF(71978,71990) = 2

We will now calculate the prime factors of 71978 and 71990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 71978 and 71990.

How to find the GCF of 71978 and 71990?

We will first find the prime factorization of 71978 and 71990. After we will calculate the factors of 71978 and 71990 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 71990

Prime factors of 71990 are 2, 5, 23, 313. Prime factorization of 71990 in exponential form is:

71990 = 2¹ × 5¹ × 23¹ × 313¹

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 71990

List of positive integer factors of 71990 that divides 71978 without a remainder.

1, 2, 5, 10, 23, 46, 115, 230, 313, 626, 1565, 3130, 7199, 14398, 35995

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 71978 and 71990. The biggest common factor number is the GCF number.
So the greatest common factor 71978 and 71990 is 2.

Also check out the Least Common Multiple of 71978 and 71990