To determine if 1681 is a prime number or a composite number, we simply look at the factors for 1681.
If the factors of 1681 are only 1681 and 1, then we know that 1681 is a prime number. Otherwise, 1681 is a composite number.
To explain better, if 1681 is only divisible by 1 and 1681, then it is a prime number, and if 1681 is divisible by more than 1681 and 1, then it is a composite number.
The factors of 1681 are as follows:
1, 41, 1681
Therefore, since 1681 is divisible by more than one and itself, the answer to the
question "Is 1681 prime or composite?" is highlighted in blue below.
composite
Is 1682 prime or composite?
OK. Now you know that 1681 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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