What is the Greatest Common Factor of 3987 and 3991?

Greatest common factor (GCF) of 3987 and 3991 is 1.

GCF(3987,3991) = 1

We will now calculate the prime factors of 3987 and 3991, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 3987 and 3991.

How to find the GCF of 3987 and 3991?

We will first find the prime factorization of 3987 and 3991. After we will calculate the factors of 3987 and 3991 and find the biggest common factor number .

Step-1: Prime Factorization of 3987

Prime factors of 3987 are 3, 443. Prime factorization of 3987 in exponential form is:

3987 = 3² × 443¹

Step-2: Prime Factorization of 3991

Prime factors of 3991 are 13, 307. Prime factorization of 3991 in exponential form is:

3991 = 13¹ × 307¹

Step-3: Factors of 3987

List of positive integer factors of 3987 that divides 3987 without a remainder.

1, 3, 9, 443, 1329

Step-4: Factors of 3991

List of positive integer factors of 3991 that divides 3987 without a remainder.

1, 13, 307

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 3987 and 3991. The biggest common factor number is the GCF number.
So the greatest common factor 3987 and 3991 is 1.

Also check out the Least Common Multiple of 3987 and 3991