"Prime Numbers I"
In math, a prime number is a number only divisible by 1 and itself.
Given the first few prime numbers
2 3 5 7 11 13 17 ...
How many prime numbers are there below 10^7? Note that ^ means exponent.
I didn't do any programming for this challenge, instead google the term "PrimePi" and there are online services which can solve this
Awnser:
664579