2,5
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the factor rainbow of 4 is 1,2,4
You do a factor rainbow to find a prime factorization. You compare prime factorizations to find a greatest common factor.
43 is a prime number and doesn't have a rainbow because it only has one prime factor: itself.
The factor rainbow of 75 is: 1 and 75 3 and 25 5 and 15 Therefore, the factor rainbow of 75 is (1, 75), (3, 25), (5, 15).
you do a factor rainbow.