68 34,2 17,2,2 2^2 x 17 = 68
68 34,2 17,2,2
68 34,2 17,2,2 2^2 x 17 = 68
68 34,2 17,2,2 2 x 2 x 17 = 68
(68, 1) (34, 2) (17, 4)
68 34,2 17,2,2 2^2 x 17 = 68
factor tree of 68:(68) = 2 * (34)(34) = 2 * 17so prime factors are 2 * 2 * 17
68 34,2 17,2,2
68 34,2 17,2,2
68 34,2 17,2,2
68 / \ 2x34 / \ 2x17
68 /\ 2 34 /\ 2 17
68 34,2 17,2,2 2^2 x 17 = 68
It looks like an upside-down tree - which is how it gets its name.
68 34,2 17,2,2 2 x 2 x 17 = 68
(68, 1) (34, 2) (17, 4)
2)68 2)34 17)17 = 1 Hence '17' is the greatest prime number factor of '68'.