525
5 x 105
5 x (5x21)
5 x (5 x (3x7))
Since 3, 5, and 7 are prime numbers, the factor tree is complete.
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1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525
The GCF is 3.
What is the greatest common factor of 525 and 735
83 is prime. No tree.
61 is already prime. It doesn't need a tree.