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Prime factorization
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Learn it Every composite number can be written as a product of primes. Use a factor tree: keep splitting until every branch is prime.
Example: Find the prime factorization of 60.
- $60 = 6 \times 10$.
- $6 = 2 \times 3$ and $10 = 2 \times 5$.
- $60 = 2 \times 2 \times 3 \times 5$ (all prime).
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