Q: Is 143,143 a Prime Number?

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

Why is 143,143 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 143143 can be evenly divided by 1 7 11 13 77 91 121 143 169 847 1,001 1,183 1,573 1,859 11,011 13,013 20,449 and 143,143, with no remainder.

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

Number	143,141	143,142	143,144	143,145
Prime?	yes	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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