Prime Numbers

Prime number is a natural number that has only two divisors: 1 and itself.

The number 1 is not a prime number by definition.

The number 15 has divisors of 1,3,5,15 because:

15/1=15

15/3=5

15/5=3

15/15=1

So 15 is not a prime number.

The number 13 has only two divisors of 1,13.

13/1=13

13/13=1

So 13 is a prime number.

Prime numbers list

2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,...