The purpose of a factor tree is to notate the process of finding the prime factorization. If a number is already prime, a factor tree is not necessary.
a factor tree
A factor tree.
8
there is NO factor tree (prime factorization) of 29.
837 279,3 93,3,3 31,3,3,3
the prime factorization of 32 is 2x2x2x2x2 and the factor tree is 32 8 4 2x4 2x2 2x2
726 363,2 121,3,2 11,11,3,2
352 prime factorization tree
If completed correctly, the bottom branch of a factor tree will be the prime factorization of the number at the top.
97 is already prime; no tree required.
23 is a prime number. No prime factorization. No tree.