83 is prime. No tree.
61 is already prime. It doesn't need a tree.
When the bottom branch consists entirely of prime numbers.
The purpose of a factor tree is to divide a number into prime factors. 1 is not a prime number.
145 5,29 Not much of a tree. More like a factor shrub.
100 50,2 25,2,2 5,5,2,2
100 50,2 25,2,2 5,5,2,2
100 50,2 25,2,2 5,5,2,2
100 50,2 25,2,2 5,5,2,2
100 50,2 25,2,2 5,5,2,2
10050,225,2,25,5,2,2
100 50,2 25,2,2 5,5,2,2
Use a factor tree. 100 50,2 25,2,2 5,5,2,2
The Greatest Common Factor of 40 and 100 is 20. 5x2x2. Use a factor tree and learn math!!!!!!!!!!!!!!
100<2x50<2x25<5x5 100<4x25<5x5 5x5=25x2=50x2=100 5x5=25x4=100
100 50,2 25,2,2 5,5,2,2 2 x 2 x 5 x 5 = 100
100 50,2 25,2,2 5,5,2,2 2 x 2 x 5 x 5 = 100