Q: Is 355,243 a Prime Number?
A: No, 355,243 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 355243 can be evenly divided by 1 7 19 133 2,671 18,697 50,749 and 355,243, with no remainder.
Since 355,243 cannot be divided by just 1 and 355,243, it is not a prime number.