To determine if 1899 is a prime number or a composite number, we simply look at the factors for 1899.
If the factors of 1899 are only 1899 and 1, then we know that 1899 is a prime number. Otherwise, 1899 is a composite number.
To explain better, if 1899 is only divisible by 1 and 1899, then it is a prime number, and if 1899 is divisible by more than 1899 and 1, then it is a composite number.
The factors of 1899 are as follows:
1, 3, 9, 211, 633, 1899
Therefore, since 1899 is divisible by more than one and itself, the answer to the
question "Is 1899 prime or composite?" is highlighted in blue below.
composite
Is 1900 prime or composite?
OK. Now you know that 1899 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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