Question
Find the prime factorization of number 645.
Answer
The prime factorization of 645 is:
$$ 645 = 3\cdot5\cdot43 $$Explanation
Prime factorization can be nicely visualized by creating a factorization tree.
| 645 can be written as 5 × 129. |
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| 129 can be written as 3 × 43. |
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| The end nodes are the prime factors of the number 645. |
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