To determine if 2178 is a prime number or a composite number, we simply look at the factors for 2178.
If the factors of 2178 are only 2178 and 1, then we know that 2178 is a prime number. Otherwise, 2178 is a composite number.
To explain better, if 2178 is only divisible by 1 and 2178, then it is a prime number, and if 2178 is divisible by more than 2178 and 1, then it is a composite number.
The factors of 2178 are as follows:
1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 99, 121, 198, 242, 363, 726, 1089, 2178
Therefore, since 2178 is divisible by more than one and itself, the answer to the
question "Is 2178 prime or composite?" is highlighted in blue below.
composite
Is 2179 prime or composite?
OK. Now you know that 2178 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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