2
1, 2
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150 75, 2 25, 3, 2 5, 5, 3, 2
61 is already prime. It doesn't need a tree.
86 43 x 2
A Factor tree looks like this:... 42... / . \..2 ...21....... / . \.......3 . 7So the prime factors of 42 are 2 x 3 x 7
Divide 950 by 1, 2, 5, 10, 19 and 25. (950,1)(475,2)(190,5)(95,10)(50,19)(38,25)