Prime number? That's a number that is divisible only by 1 or itself ... According to some text I read, a prime number is one which cannot be expressed as a product of two whole numbers other than itself and 1 ... For example, 6 equals 2 times 3, so 6 is not prime - 7 is prime 'cause only 1 and 7 can be multiplied together to give 7.
Easy? ... I think my short explanation above is better - some people get so involved.

Anyway, I was lucky to go to a good high school ... and I did my homework.
Hope you do too ... do the best you can ... and if you need help, ASK.
And if the teacher is "playing games" ... killing time, wasting your time,
Tell your care-taker, but do what you can to stop it ... it's WRONG.

Interested in the ... Largest Known Primes ?
Interested in a ... Short Lesson on Primes ?
Interested in a ... Prime Glossary ?
Here one more ... Mathematics Encyclopedia .

Enter a number ... see if it is a prime ... or see the divisor.