2 x 3 x 3 x 7 x 7 = 882
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83 is prime. No tree.
The purpose of a factor tree is to divide a number into prime factors. 1 is not a prime number.
When the bottom branch consists entirely of prime numbers.
167 is already prime. No need for a tree.
A Factor tree looks like this:... 42... / . \..2 ...21....... / . \.......3 . 7So the prime factors of 42 are 2 x 3 x 7