What is the Greatest Common Factor of 639 and 643?
Greatest common factor (GCF) of 639 and 643 is 1.
GCF(639,643) = 1
We will now calculate the prime factors of 639 and 643, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 639 and 643.
How to find the GCF of 639 and 643?
We will first find the prime factorization of 639 and 643. After we will calculate the factors of 639 and 643 and find the biggest common factor number .
Step-1: Prime Factorization of 639
Prime factors of 639 are 3, 71. Prime factorization of 639 in exponential form is:
639 = 32 × 711
Step-2: Prime Factorization of 643
Prime factors of 643 are 643. Prime factorization of 643 in exponential form is:
643 = 6431
Step-3: Factors of 639
List of positive integer factors of 639 that divides 639 without a remainder.
1, 3, 9, 71, 213
Step-4: Factors of 643
List of positive integer factors of 643 that divides 639 without a remainder.
1
Final Step: Biggest Common Factor Number
We found the factors and prime factorization of 639 and 643. The biggest common factor number is the GCF number.
So the greatest common factor 639 and 643 is 1.
Also check out the Least Common Multiple of 639 and 643
Related Greatest Common Factors of 639
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Related Greatest Common Factors of 643
- GCF of 643 and 647
- GCF of 643 and 648
- GCF of 643 and 649
- GCF of 643 and 650
- GCF of 643 and 651
- GCF of 643 and 652
- GCF of 643 and 653
- GCF of 643 and 654
- GCF of 643 and 655
- GCF of 643 and 656
- GCF of 643 and 657
- GCF of 643 and 658
- GCF of 643 and 659
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