Discussion on Java Primality Test Challenge

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2 months ago+ 0 comments

Just add this to the main method :)

        if((new BigInteger(n).isProbablePrime(100)))
            System.out.println("prime");
        else 
            System.out.println("not prime");

2 months ago+ 0 comments

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;



public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

        String n = bufferedReader.readLine();
        
        bufferedReader.close();
        
        BigInteger big = new BigInteger(n);
        
        if(big.isProbablePrime(2)){
            System.out.println("prime");                    
        }
        else{
            System.out.println("not prime");        
            }
    }
}

2 months ago+ 0 comments

import java.io.; import java.math.; import java.security.; import java.text.; import java.util.; import java.util.concurrent.; import java.util.regex.*;

public class Solution { public static void main(String[] args) throws IOException { BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

    String n = bufferedReader.readLine();
    BigInteger s = new BigInteger(n);

    if(s.equals(BigInteger.ONE)){
        System.out.println("not prime");
    }

    else{

    int certainty = 5;
    boolean isPrime = s.isProbablePrime(certainty);

    if(isPrime){
        System.out.println("prime");
    }
    else{
        System.out.println("not prime");
    }
    }



    bufferedReader.close();
}

}

2 months ago+ 0 comments

System.out.println(new BigInteger(n).isProbablePrime(1) ? "prime" : "not prime");

4 months ago+ 0 comments

public class Solution { public static void main(String[] args) throws IOException { BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

    String n = bufferedReader.readLine();
    BigInteger b = new BigInteger(n);
    if(b.isProbablePrime(100)){
        System.out.println("prime");
    }else{
        System.out.println("not prime");
    }

    bufferedReader.close();
}

}

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