31 is prime. No tree.
43 is prime. No tree.
29 is prime. No tree.
Since 5 is a prime, it looks like the end of a branch.
77 7,11
13 is already prime. It doesn't need a tree.
273 91,3 13,7,3
Pretty small. 35 5,7
3 * 13 (both prime numbers)
675 225,3 75,3,3 25,3,3,3 5,5,3,3,3
2412 26 23 3The numbers in bold a prime factors.
83 is prime. No tree.