Sabtu, 08 Desember 2012

a prime number

In mathematics, a prime number is a natural number greater than 1, the denominator factors are 1 and the number itself. 2 and 3 is a prime number. 4 is not a prime number because 4 can be divided by 2. Ten of the first prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29.

If a number greater than one is not a prime number, then the number is called a composite number. The simplest way to determine prime numbers smaller than a certain number is to use the sieve of Eratosthenes

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