Answers

2015-07-09T20:36:36+05:30
The number which has only two factor that is one and the number itself.
0
2015-07-09T20:38:09+05:30
Prime numbers are those numbers whose factors are the number itself and one
2,3,5,7,9,11,13,17,19,23 etc
1 2 1
they r the number those factores are the number itself 1 ,2 ,3 , 5 ,7 , 9 ,11 , 13 ......ect
sherryifan, it is not 1 because it has only one factor and a prime number is a number factor with 1 and the number itself. So 1 is not prime number.
1 is neither composite nor prime