Q: Is 401,143 a Prime Number?

A: No, 401,143 is not a prime number.

Why is 401,143 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 401143 can be evenly divided by 1 23 107 163 2,461 3,749 17,441 and 401,143, with no remainder.

Since 401,143 cannot be divided by just 1 and 401,143, it is not a prime number.

Number	401,141	401,142	401,144	401,145
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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