Number of Prime Numbers??

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Cinji18: Senior | Next Rank: 100 Posts; Posts: 84; Joined: Sat Feb 20, 2010 5:11 pm; Thanked: 1 times

by Cinji18 » Sat Sep 04, 2010 8:47 pm

Is there a way to find out the number of prime numbers within a given range without listing them out? For example, the number of prime numbers between 1 and 200, or between 1500 to 4050?

Thanks.

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Source: Beat The GMAT — Problem Solving | Sat Sep 04, 2010 8:47 pm

niksworth: Legendary Member; Posts: 520; Joined: Mon Jun 14, 2010 10:44 amFollowed by: 6 members; Thanked: 70 times

by niksworth » Sat Sep 04, 2010 11:58 pm

There is no such way.

The only way to find primes is to individually check each number in the range for divisibility.

scio me nihil scire

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