GCF for 680 and 612
"Greatest Common Factor" Calculator
What is the Greatest common Divisor of 680 and 612?
Answer: GCF of 680 and 612 is 68
(Sixty-eight)
Finding GCF for 680 and 612 using all factors (divisors) listing
The first method to find GCF for numbers 680 and 612 is to list all factors for both numbers and pick the highest common one:
All factors of 680: 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680
All factors of 612: 1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 51, 68, 102, 153, 204, 306, 612
So the Greatest Common Factor for 680 and 612 is 68
Finding GCF for 680 and 612 by Prime Factorization
The second method to find GCF for numbers 680 and 612 is to list all Prime Factors for both numbers and multiply the common ones:
All Prime Factors of 680: 2, 2, 2, 5, 17
All Prime Factors of 612: 2, 2, 3, 3, 17
As we can see there are Prime Factors common to both numbers: 2, 2, 17
Now we need to multiply them to find GCF: 2 × 2 × 17 = 68
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GCF Table
| Number 1 | Number 2 | GCF |
|---|---|---|
| 665 | 612 | 1 |
| 666 | 612 | 18 |
| 667 | 612 | 1 |
| 668 | 612 | 4 |
| 669 | 612 | 3 |
| 670 | 612 | 2 |
| 671 | 612 | 1 |
| 672 | 612 | 12 |
| 673 | 612 | 1 |
| 674 | 612 | 2 |
| 675 | 612 | 9 |
| 676 | 612 | 4 |
| 677 | 612 | 1 |
| 678 | 612 | 6 |
| 679 | 612 | 1 |
| 680 | 612 | 68 |
| 681 | 612 | 3 |
| 682 | 612 | 2 |
| 683 | 612 | 1 |
| 684 | 612 | 36 |
| 685 | 612 | 1 |
| 686 | 612 | 2 |
| 687 | 612 | 3 |
| 688 | 612 | 4 |
| 689 | 612 | 1 |
| 690 | 612 | 6 |
| 691 | 612 | 1 |
| 692 | 612 | 4 |
| 693 | 612 | 9 |
| 694 | 612 | 2 |
About "Greatest Common Factor" Calculator
This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest common Divisor of 680 and 612? (The answer is: 68). Select the first number (e.g. '680') and the second number (e.g. '612'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder