To determine if 311 is a prime number or a composite number, we simply look at the factors for 311.
If the factors of 311 are only 311 and 1, then we know that 311 is a prime number. Otherwise, 311 is a composite number.
To explain better, if 311 is only divisible by 1 and 311, then it is a prime number, and if 311 is divisible by more than 311 and 1, then it is a composite number.
The factors of 311 are as follows:
1, 311
Therefore, since 311 is divisible by only one and itself, the answer to the
question "Is 311 prime or composite?" is highlighted in blue below.
prime
Is 312 prime or composite?
OK. Now you know that 311 is a prime number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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