sample of prime numbers

[Cpp]# Include # Include Using namespace std;Const int nmax= 10000000;Int isPrime [nMax];Int prime [nMax];Int factor [nMax];Int len;Void f1 () // simple Filter{Int n; // calculates the prime number between [1, n ].Scanf ("% d", n );Len = 0;Memset (isPrime, 0, sizeof (isPrime ));IsPrime [0] = isPrime [1] = 1;Int I;For (I = 2; I {If (! IsPrime [I]){Prime [len ++]

for prime numbers within 100by white Shinhuata (http://blog.csdn.net/whiterbear) reprint need to indicate the source, thank you.Description: Output - all prime numbers within the prime number are separated by a single space Analysis: First,

an even number, and if so, the end of judgment-not a prime number;Step 2 If n is not even but composite, its factor can never be an even number ( cause even x even = even), even x odd = even),Therefore, when judging the factor of odd N, we can omit the judgment of the dual number. (i+=2)1 Static BooleanIsprime_1 (intN) {2 intTmp= (int) math.sqrt (N);3 //Step 14 if(n==2)return true;5 if(n%2==0)return false;6

A Eratosthenes sieve method (the idea is very good is the complexity is a bit high) (O (Nlognlogn))The multiple of the principle prime number is not a number of prime numbers, the number of which is not more than the multiples of his small (1) of the numbers is prime.2 is th

1. Loop nesting, the outer loop is from 1-1000 of the number I (1 excluded, which you should understand), the inner layer is the number I of the prime judgment.2. Prime number: There is no other factor except 1 and itself. It can also be understood that except for 1 and itself, the remainder of the number is not 0.3. So the inner loop is used from 2 to the square root of I (rounding) in order to find the re

The first day of the formal study of Java, write down this article on the solution of prime numbers, hoping to improve better. First of all, the problem of solving prime numbers on C was not very much at that time. The method that has been used is to increment from 2 to n-1, if a number can be divisible

Http://blog.sina.com.cn/s/blog_622e77cc0100n5lm.html1, according to the definition of prime numbers to seekPrime number definitions: natural numbers (excluding 1), which can be divisible by only 1 or itself, are called prime numbers.Its definition can be used to iterate over the number divided by each natural number sm

This article describes how to use Python to determine prime numbers, python, which is often used for scientific computation, can handle this small problem. of course, you can refer to the subprime number or prime number as needed. In a natural number greater than 1, except for 1 and the integer itself, it cannot be divisible by other natural

This article describes how to use Python to determine prime numbers, python, which is often used for scientific computation, handles this small problem. of course, you can refer to this article to explain how to use Python to determine prime numbers, python, which is often used for scientific computing, handles this sm

Quick Search prime time limit: 1000 MS | memory limit: 65535 kb difficulty: 3 Description Now I want to give you a positive integer N, which requires you to quickly find all the prime numbers in the numbers 2... n. Input Returns a positive integer n (n However, when n is 0, the pro