我粗略算了四千多个质数

[imagex]

//四千多个质数
import java.io.*;
public class test{
public static void main(String agrs[]){
int numbers[]=new int[39999];
int compared=0;
int howmany=0;
String result="";
for(int i=0;i<39999;i++)
{
numbers[i]=i+2;
}

for(int i=0;i<200;i++)
{
if (numbers[i]!=0)
{
compared=numbers[i];
for(int j=compared;j<39999;j++)
{
if(numbers[j]%compared==0)
{
numbers[j]=0;
}

}
}
}
for(int i=0;i<39999;i++)
{
if(numbers[i]!=0)
{
howmany++;
result=result+" "+String.valueOf(howmany)+"."+String.valueOf(numbers[i]);
}

}
System.out.println(result);

}
}