To determine if 3639 is a prime number or a composite number, we simply look at the factors for 3639.
If the factors of 3639 are only 3639 and 1, then we know that 3639 is a prime number. Otherwise, 3639 is a composite number.
To explain better, if 3639 is only divisible by 1 and 3639, then it is a prime number, and if 3639 is divisible by more than 3639 and 1, then it is a composite number.
The factors of 3639 are as follows:
1, 3, 1213, 3639
Therefore, since 3639 is divisible by more than one and itself, the answer to the
question "Is 3639 prime or composite?" is highlighted in blue below.
composite
Is 3640 prime or composite?
OK. Now you know that 3639 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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