66
33,2
11,3,2
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A factor tree is a visual metod of breaking down any number into its consituent set of prime number factors. in the case of 66: 66 = 33 x 2 = 11 x 3 x 2 where 11, 3 and 2 are prime numbers and cannot be split down further. Each slit can be represented visually as a branch with the composite numbers at rhe end of each twig giving the name as a factor 'tree'.
The prime factor tree of 280 is:140,270,2,235,2,2,27,5,2,2,2
factor trees and prime factor trees are the same thing with different names.
the prime factor of 5
281 is prime. No tree.