Sieve of Eratosthenes                           Class VI

A prime number is a natural number that has exactly two distinct natural number divisors: 1 and itself.
The sieve of Eratosthenes is one of the most efficient ways to find all primes smaller than n when n is smaller than 10 million.

https://upload.wikimedia.org/wikipedia/commons/b/b9/Sieve_of_Eratosthenes_animation.gif











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