To determine if 2151 is a prime number or a composite number, we simply look at the factors for 2151.
If the factors of 2151 are only 2151 and 1, then we know that 2151 is a prime number. Otherwise, 2151 is a composite number.
To explain better, if 2151 is only divisible by 1 and 2151, then it is a prime number, and if 2151 is divisible by more than 2151 and 1, then it is a composite number.
The factors of 2151 are as follows:
1, 3, 9, 239, 717, 2151
Therefore, since 2151 is divisible by more than one and itself, the answer to the
question "Is 2151 prime or composite?" is highlighted in blue below.
composite
Is 2152 prime or composite?
OK. Now you know that 2151 is a composite 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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