What is the Greatest Common Factor of 25978 and 25990?

Greatest common factor (GCF) of 25978 and 25990 is 2.

GCF(25978,25990) = 2

We will now calculate the prime factors of 25978 and 25990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25978 and 25990.

How to find the GCF of 25978 and 25990?

We will first find the prime factorization of 25978 and 25990. After we will calculate the factors of 25978 and 25990 and find the biggest common factor number .

Step-1: Prime Factorization of 25978

Prime factors of 25978 are 2, 31, 419. Prime factorization of 25978 in exponential form is:

25978 = 2¹ × 31¹ × 419¹

Step-2: Prime Factorization of 25990

Prime factors of 25990 are 2, 5, 23, 113. Prime factorization of 25990 in exponential form is:

25990 = 2¹ × 5¹ × 23¹ × 113¹

Step-3: Factors of 25978

List of positive integer factors of 25978 that divides 25978 without a remainder.

1, 2, 31, 62, 419, 838, 12989

Step-4: Factors of 25990

List of positive integer factors of 25990 that divides 25978 without a remainder.

1, 2, 5, 10, 23, 46, 113, 115, 226, 230, 565, 1130, 2599, 5198, 12995

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25978 and 25990. The biggest common factor number is the GCF number.
So the greatest common factor 25978 and 25990 is 2.

Also check out the Least Common Multiple of 25978 and 25990