To determine if 7830 is a prime number or a composite number, we simply look at the factors for 7830.
If the factors of 7830 are only 7830 and 1, then we know that 7830 is a prime number. Otherwise, 7830 is a composite number.
To explain better, if 7830 is only divisible by 1 and 7830, then it is a prime number, and if 7830 is divisible by more than 7830 and 1, then it is a composite number.
The factors of 7830 are as follows:
1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 29, 30, 45, 54, 58, 87, 90, 135, 145, 174, 261, 270, 290, 435, 522, 783, 870, 1305, 1566, 2610, 3915, 7830
Therefore, since 7830 is divisible by more than one and itself, the answer to the
question "Is 7830 prime or composite?" is highlighted in blue below.
composite
Is 7831 prime or composite?
OK. Now you know that 7830 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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