To determine if 1678 is a prime number or a composite number, we simply look at the factors for 1678.
If the factors of 1678 are only 1678 and 1, then we know that 1678 is a prime number. Otherwise, 1678 is a composite number.
To explain better, if 1678 is only divisible by 1 and 1678, then it is a prime number, and if 1678 is divisible by more than 1678 and 1, then it is a composite number.
The factors of 1678 are as follows:
1, 2, 839, 1678
Therefore, since 1678 is divisible by more than one and itself, the answer to the
question "Is 1678 prime or composite?" is highlighted in blue below.
composite
Is 1679 prime or composite?
OK. Now you know that 1678 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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