What is the Greatest Common Factor of 65991 and 66005?

Greatest common factor (GCF) of 65991 and 66005 is 1.

GCF(65991,66005) = 1

We will now calculate the prime factors of 65991 and 66005, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 65991 and 66005.

How to find the GCF of 65991 and 66005?

We will first find the prime factorization of 65991 and 66005. After we will calculate the factors of 65991 and 66005 and find the biggest common factor number .

Step-1: Prime Factorization of 65991

Prime factors of 65991 are 3, 21997. Prime factorization of 65991 in exponential form is:

65991 = 3¹ × 21997¹

Step-2: Prime Factorization of 66005

Prime factors of 66005 are 5, 43, 307. Prime factorization of 66005 in exponential form is:

66005 = 5¹ × 43¹ × 307¹

Step-3: Factors of 65991

List of positive integer factors of 65991 that divides 65991 without a remainder.

1, 3, 21997

Step-4: Factors of 66005

List of positive integer factors of 66005 that divides 65991 without a remainder.

1, 5, 43, 215, 307, 1535, 13201

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 65991 and 66005. The biggest common factor number is the GCF number.
So the greatest common factor 65991 and 66005 is 1.

Also check out the Least Common Multiple of 65991 and 66005