When the bottom branch consists entirely of prime numbers.
Since prime numbers only have one prime factor (themselves), factor trees are unnecessary.
Here is a factor tree of 39: 39 3 x 13 Since these are prime numbers, the factor tree is finished. The prime factors of 39 are 3 and 13.
22 2 x 11 Both 2 and 11 are prime numbers, so the factor tree is finished.
323 17 x 19 Both 17 and 19 are prime numbers, so the factor tree is finished.
as you can obviously see the bottom of a factor tree would be the curious numbers of 2,2,3,5
Their at the bottom of the tree because the hole point of a factor tree is to find the prime factorization of the number, so it would be at the bottom of the tree.
2,2,3,7
3 and 5
The bottom branch of a factor tree consists entirely of prime numbers.
When the bottom branch is all prime numbers.
2,3,3,7
When the bottom branch consists entirely of prime numbers.
3 and 7
2 and 7.
When the bottom row consists of all prime numbers.
3 and 7