Pollard’s Rho Algorithm for Prime Factorization in java
這是一種執行給定整數分解的演算法。以下是實施用於質因數分解的 Rho 演算法的程式。
程式
public class PollardsRho {
int num = 65;
public int gcd(int a, int b) {
int gcd = 0;
for(int i = 1; i <= a || i <= b; i++) {
if( a%i == 0 && b%i == 0 ) {
gcd = i;
}
}
return gcd;
}
int g(int x) {
return ((x*x)-1) % num;
}
public static void main(String args[]) {
PollardsRho obj = new PollardsRho();
int x = 2, y = 2, d = 1;
while(d==1) {
x = obj.g(x);
y = obj.g(obj.g(y));
d = obj.gcd((x - y), obj.num);
}
if (d == obj.num) {
System.out.println("Cannot calculate GCD for this element");
} else {
System.out.println("One of the divisors of given number is "+d);
}
}
}輸出
One of the divisors of given number are 5
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