Q: Is 631,003 a Prime Number?
A: Yes, 631,003 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 631003 can be evenly divided by 1 and 631,003, with no remainder.
Since 631,003 can be divided by just 1 and 631,003, it is a prime number.