its not your face it is infact
63
/ \
7 9
/ \
3 3
61 is already prime. It doesn't need a tree.
No, 9 is a factor of 63.
63 has a square factor, but no equal ones.
Since 7 is a factor of 63, it is automatically the GCF.
Factors of 63... 1,3,7,9,21,63
63 21,3 7,3,3
63 21,3 7,3,3
63 21,3 7,3,3
63=21x3=3x7x3
63 21,3 7,3,3
63 21,3 7,3,3
63 21,3 7,3,3
63 21,3 7,3,3
63 ^ 7*9 ^ 3*3
63 3,21 3,3,7 35 5,7
3*3*7
61 is already prime. It doesn't need a tree.