Q: Is 266,503 a Prime Number?
A: No, 266,503 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 266503 can be evenly divided by 1 59 4,517 and 266,503, with no remainder.
Since 266,503 cannot be divided by just 1 and 266,503, it is not a prime number.