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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There are 168 prime numbers less than 1,000.
eight (8)
The only even prime number is... 2 !
59 and 53 are the two largest primes less than 60. 59+53 = 112
Except for 1, all of them.