Q: Is 28,143 a Prime Number?

A: No, 28,143 is not a prime number.

Why is 28,143 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 28143 can be evenly divided by 1 3 9 53 59 159 177 477 531 3,127 9,381 and 28,143, with no remainder.

Since 28,143 cannot be divided by just 1 and 28,143, it is not a prime number.

Number	28,141	28,142	28,144	28,145
Prime?	no	no	no	no

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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