Q: Is 4,991 a Prime Number?
A: No, 4,991 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 4991 can be evenly divided by 1 7 23 31 161 217 713 and 4,991, with no remainder.
Since 4,991 cannot be divided by just 1 and 4,991, it is not a prime number.