A number divisible only by itself and by 1.
Prime numbers up to 100 : 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.
There are 25 prime numbers up to 100, 46 prime numbers up to 200.
Prime numbers greater than 3 are usually of the form 6n+1 or 6n-1. But it isn't necessary that all the numbers of the form 6n+1 & 6n-1 are prime numbers.
No comments:
Post a Comment