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You may find the exact number somewhere else, but a rough approximation is that up to a number "n", about one of every ln(n) numbers is a Prime number. ln() is the natural logarithm (logarithm to the base "e"); in this case, for numbers up to 2 million, you would expect approximate one out of every 14 numbers to be a prime.
More information in the Wikipedia article on "prime counting function".
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How many primes are less than 1000?
There are 168 prime numbers less than 1,000.
How many twin primes less than 100?
eight (8)
How many even primes are there less than 100?
The only even prime number is... 2 !
What is the sum of the two largest primes less than 60?
59 and 53 are the two largest primes less than 60. 59+53 = 112
How many positive integers less than 2101 are divisible by atleast one of the primes?
Except for 1, all of them.
How many primes are less than 100?
There 25 primes less than 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.
How many primes under 100000000?
There are 5,761,455 primes less than 100,000,000. The largest of which is 99,999,989.
How many primes are less than 1000?
There are 168 prime numbers less than 1,000.
How many twin primes less than 100?
eight (8)
How many twin primes greater than 50 but less than 200 are there?
9.
How many 2 twin primes are less than 100?
There are 8 twin primes less than 100. 3,5 : 5,7 : 11,13 : 17,19 : 29,31 : 41,43 : 59,61 : 71,73
How many prime numbers are there less in 100?
There are 25 primes smaller than 100.
How many prime numbers under 999999000000?
The number of primes less than x is approx x/ln(x). So for x = 999999000000, the number is approx 36,191 million.
What are the odd primes less than twenty?
The odd primes less than 20 are: 3 5 7 11 13 17 19
How many even primes are there less than 100?
The only even prime number is... 2 !
What is the sum of the two largest primes less than 60?
59 and 53 are the two largest primes less than 60. 59+53 = 112
What are the twin primes less than hundred?
37 and 79
