To determine if 409 is a prime number or a composite number, we simply look at the factors for 409.
If the factors of 409 are only 409 and 1, then we know that 409 is a prime number. Otherwise, 409 is a composite number.
To explain better, if 409 is only divisible by 1 and 409, then it is a prime number, and if 409 is divisible by more than 409 and 1, then it is a composite number.
The factors of 409 are as follows:
1, 409
Therefore, since 409 is divisible by only one and itself, the answer to the
question "Is 409 prime or composite?" is highlighted in blue below.
prime
Is 410 prime or composite?
OK. Now you know that 409 is a prime 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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