To determine if 251 is a prime number or a composite number, we simply look at the factors for 251.
If the factors of 251 are only 251 and 1, then we know that 251 is a prime number. Otherwise, 251 is a composite number.
To explain better, if 251 is only divisible by 1 and 251, then it is a prime number, and if 251 is divisible by more than 251 and 1, then it is a composite number.
The factors of 251 are as follows:
1, 251
Therefore, since 251 is divisible by only one and itself, the answer to the
question "Is 251 prime or composite?" is highlighted in blue below.
prime
Is 252 prime or composite?
OK. Now you know that 251 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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