To determine if 4000 is a prime number or a composite number, we simply look at the factors for 4000.
If the factors of 4000 are only 4000 and 1, then we know that 4000 is a prime number. Otherwise, 4000 is a composite number.
To explain better, if 4000 is only divisible by 1 and 4000, then it is a prime number, and if 4000 is divisible by more than 4000 and 1, then it is a composite number.
The factors of 4000 are as follows:
1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000
Therefore, since 4000 is divisible by more than one and itself, the answer to the
question "Is 4000 prime or composite?" is highlighted in blue below.
composite
Is 4001 prime or composite?
OK. Now you know that 4000 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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