If the prime factorization contains a 5 and a 7, 35 is a factor.
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Notice whether the number is odd or even. If it's even, the first prime factor is 2.
The only name is factorization.
the prime factorization
A factor free is a diagram showing the prime factorization of a number.
Each composite number has its own unique prime factorization. The largest number in that factorization would be the largest prime factor. It will never be more than half of the original number.