To determine if 1900 is a prime number or a composite number, we simply look at the factors for 1900.
If the factors of 1900 are only 1900 and 1, then we know that 1900 is a prime number. Otherwise, 1900 is a composite number.
To explain better, if 1900 is only divisible by 1 and 1900, then it is a prime number, and if 1900 is divisible by more than 1900 and 1, then it is a composite number.
The factors of 1900 are as follows:
1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 380, 475, 950, 1900
Therefore, since 1900 is divisible by more than one and itself, the answer to the
question "Is 1900 prime or composite?" is highlighted in blue below.
composite
Is 1901 prime or composite?
OK. Now you know that 1900 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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