To determine if 6421 is a prime number or a composite number, we simply look at the factors for 6421.
If the factors of 6421 are only 6421 and 1, then we know that 6421 is a prime number. Otherwise, 6421 is a composite number.
To explain better, if 6421 is only divisible by 1 and 6421, then it is a prime number, and if 6421 is divisible by more than 6421 and 1, then it is a composite number.
The factors of 6421 are as follows:
1, 6421
Therefore, since 6421 is divisible by only one and itself, the answer to the
question "Is 6421 prime or composite?" is highlighted in blue below.
prime
Is 6422 prime or composite?
OK. Now you know that 6421 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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