Best Answer

1 is neither a prime, nor a composite number. A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

Study guides

☆☆

More answers

One is a multiple and a factor.

Because it isn't a prime number.

Q: Why isn't 1 a prime factor?

Write your answer...

Submit

Still have questions?

Continue Learning about Movies & Television

Nope.... 1 is a factor of every prime number !

The purpose of a factor tree is to divide a number into prime factors. 1 is not a prime number.

1 and 5 5 is prime.

9 is not prime, so it is not a prime factor of 72, great or otherwise.

1 and 47. 47 is prime.

Related questions

1 is not prime, so it can't be a prime factor.

No, 1 is not prime.

1 is a factor of 18; neither 1 nor 18 is prime.

All prime numbers have a common factor of 1.

Nope.... 1 is a factor of every prime number !

Because 1 is not a prime number.

No - as 1 is not a prime number.

No, 1 is not a prime number.

No, 1 is not a prime number.

71 is a prime number and its only prime factor is itself. Its only other factor is 1, which is not a prime number.none because 71 is prime71 is a prime number and its only prime factor is itself. Its only other factor is 1, which is not a prime number.none because 71 is prime

The prime factor of 7 is 7. The prime factor of 121 is 11.

The purpose of a factor tree is to divide a number into prime factors. 1 is not a prime number.