HOW MANY PRIME FACTORS ARE THERE FROM THE NUMBER 1 TO 100
The prime factors from 1 to 100 are 25 as shown below:
1,2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,61,67,71,73,79,83,89 and 97
How many prime numbers are there below 100?