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1 is special. In all classes I've taken, it's been considered not a Prime number.
As for a prime factor, you wouldn't include it in factoring.
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Earn +20 ptsQ: Is one a prime factor
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Continue Learning about Basic Math
How many prime factors does 32 have?
32 has one prime factor: 232 has only one prime factor: 2
What number has only one prime factor?
No prime number only has one factor. Each prime number has itself and 1 as factors. Now, the number 1 of course has only one factor, but it is technically not a prime number.
How do you express the prime numbers in factor tree method?
Since prime numbers only have one prime factor (themselves), factor trees are unnecessary.
What numbers have only one prime factor?
Prime numbers.
Why isn't one a prime factor?
Because one isn't a prime number.
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