Q: Is 15,403 a Prime Number?
A: No, 15,403 is 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 15403 can be evenly divided by 1 73 211 and 15,403, with no remainder.
Since 15,403 cannot be divided by just 1 and 15,403, it is not a prime number.