What is the Greatest Common Factor of 9991 and 10000?

Greatest common factor (GCF) of 9991 and 10000 is 1.

GCF(9991,10000) = 1

We will now calculate the prime factors of 9991 and 10000, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9991 and 10000.

How to find the GCF of 9991 and 10000?

We will first find the prime factorization of 9991 and 10000. After we will calculate the factors of 9991 and 10000 and find the biggest common factor number .

Step-1: Prime Factorization of 9991

Prime factors of 9991 are 97, 103. Prime factorization of 9991 in exponential form is:

9991 = 97¹ × 103¹

Step-2: Prime Factorization of 10000

Prime factors of 10000 are 2, 5. Prime factorization of 10000 in exponential form is:

10000 = 2⁴ × 5⁴

Step-3: Factors of 9991

List of positive integer factors of 9991 that divides 9991 without a remainder.

1, 97, 103

Step-4: Factors of 10000

List of positive integer factors of 10000 that divides 9991 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 5000

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9991 and 10000. The biggest common factor number is the GCF number.
So the greatest common factor 9991 and 10000 is 1.

Also check out the Least Common Multiple of 9991 and 10000