Q: Is 311,000 a Prime Number?
A: No, 311,000 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 311000 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 125 200 250 311 500 622 1,000 1,244 1,555 2,488 3,110 6,220 7,775 12,440 15,550 31,100 38,875 62,200 77,750 155,500 and 311,000, with no remainder.
Since 311,000 cannot be divided by just 1 and 311,000, it is not a prime number.