Q: Is 31 prime or composite number?

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31 is prime.

961 is not prime. 961 = 31 * 31

31 is a prime number because it is only divisible by 1 and itself.

21 is composite number that is a multiple of 3. 31 is a prime number.

13 prime 63 composite 61 prime 31 prime Well the question should have been either, Which one of these numbers is not a composite number? Or, Which one of these numbers is not a prime number?

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It is a prime.

31 is prime.

31 is a prime number

31 is prime.

31 is a prime number.

Composite. Its prime factors are 23 and 31.

27 and 31 are prime.

961 is not prime. 961 = 31 * 31

39 is a composite number 1 is neither prime nor composite number 31 and 41 are prime numbers.

31 is a prime number

No, it is a prime number.

31 is a prime number because it is only divisible by 1 and itself.