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# Is the number one a prime factor?

Updated: 11/2/2022

Wiki User

12y ago

No 1 it is not a Prime number. The definition of a prime number is that it can only have factors of one and itself. Since one already has one then it can not be a prime number.

Wiki User

12y ago

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Q: Is the number one a prime factor?
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Related questions

### 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 you know that 2 is a prime factor?

2 is a prime number because its only factors are one and itself. Since 2 is a prime number, if it is a factor of your number, it is a prime factor.

### Is a prime factor the same as a proper factor?

No, a prime factor is a single factor that is a prime number. A proper factor is a member of the set of factors that doesn't include one and the number itself.

### Why isn't one a prime factor?

Because one isn't a prime number.

Itself and one

### If a number is not prime it is?

If a number is not prime- that is, if a number has a positive factor besides one and itself- it is a composite number.

prime number

### Does a prime number have a factor tree?

No. A prime number is one that has no factors except the number '1' and itself.

### How old is someone with the 1 factor and is not a prime number?

The only number with one factor is 1.

### What is the name of a composite number with only 1 prime factor?

Squares (or cubes or more) of prime numbers have one distinct prime factor, but if you're counting them individually, all composite numbers have at least two prime factors.

### 1 is not a prime number because it has only one factor. explain?

I think you already did. Prime numbers have exactly two factors. 1 is not a prime number because it has only one factor.

### What is the gcf if one number is prime and the other is composite?

The answer depends on whether or not the prime number is a factor of the other number.If the prime number is a factor of the other number then the GCF is the prime, otherwise the GCF is 1.