51
3,17
Factor tree for 51: 51 * 1 or 17 * 3 Factor tree for 255: 255 * 1 or 51 * 5
well it would be 51
Since 61 is already prime, a factor tree is not necessary. The prime factorization of 51 is 3 x 17, which wouldn't make much of a tree. More like a factor shrub.
51 3,17
51 3,17
33 3,11 51 3,17
51 3,17
51 3, 17
It is: 3*17 = 51
36 18,2 9,2,2 3,3,2,2 51 3,17
Factor Tree of 612: ..........612 ............/ \ ........12 * 51 ......../ \ ......6 * 2 ...../ \ ...2 * 3 Prime factorization of 612 = 2 * 2 * 3 * 51
51 3,17 81 9,9 3,3,9 3,3,3,3 The GCF is 3.