Q: Is 78,003 a Prime Number?

A: No, 78,003 is not a prime number.

Why is 78,003 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 78003 can be evenly divided by 1 3 9 27 81 107 243 321 729 963 2,889 8,667 26,001 and 78,003, with no remainder.

Since 78,003 cannot be divided by just 1 and 78,003, it is not a prime number.

Number	78,001	78,002	78,004	78,005
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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