Yes, 31 is a Prime number. If you Google "Prime Numbers", you can see a chart of all the prime numbers.
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31 is PRIME.
None. 31 is a prime number.
31 is prime.
31 is a prime number because it has only two factors which are itself and one
The factors of 961 are 1, 31, and 961. The prime factors of 961 are 31 and 31. The prime factorization of 961 is 31 x 31 or, in exponential form, 312.