72 = 2 x 2 x 2 x 3 x 3
Of those prime factors, 3 is the greatest
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The greatest common factor of 25 and 72 is 1, so they are relatively prime.
6 is not a prime number but it is a factor of 72
13 is the greatest prime factor of 52.
Greatest Prime Factor of 70The prime factorization of 70 is 2 X 5 X 7, so the greatest prime factor in the prime factorization of 70 is 7.
One way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 32 are 1, 2, 4, 8, 16, and 32. The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. The factors of 88 are 1, 2, 4, 8, 11, 22, 44, and 88. The common factors are 1, 2, 4, and 8. Therefore, the greatest common factor is 8. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 32 are 2, 2, 2, 2, and 2. The prime factors of 72 are 2, 2, 2, 3, and 3. The prime factors of 88 are 2, 2, 2, and 11. The prime factors in common are 2, 2, and 2, so the greatest common factor is 2 x 2 x 2 = 8.