Place the number you want to factor at the top of the page. Divide it by prime numbers until all the factors are prime. Example: 210
210
105,2
35,3,2
7,5,3,2
2 x 3 x 5 x 7 = 210
No.
No.
196 98,2 49,2,2 7,7,2,2
Prime numbers don't have factor trees. So if you can create a tree, your number's composite.
64 32,2 16,2,2 8,2,2,2 4,2,2,2,2 2,2,2,2,2,2
IT IS PRIME there is no factor tree
factor tree of 216
Factor tree of 204
The factor tree of 50:5025,25,5,25025,25,5,2
21
83 is prime. No tree.
The prime factor tree of 280 is:140,270,2,235,2,2,27,5,2,2,2