Related Articles

Related Articles

BigInteger nextProbablePrime() Method in Java with Examples
  • Last Updated : 08 Apr, 2019


The java.math.BigInteger.nextProbablePrime() is used to find the first integer greater than this BigInteger that is probably prime. If this method returns ‘p’ then there is no prime number ‘q’ between this Biginteger and ‘p’ (this < q < p ) i.e. it never skips any prime number greater than BigInteger that is used to call the method.

Syntax:

public BigInteger nextProbablePrime()

Parameters: The method doesn’t accept any Parameters.
Return: This method returns a Biginteger which holds the first integer greater than this BigInteger that is probably prime number.

Exception: The number must be non – negative and not too large otherwise Arithmetic Exception is thrown.

Below programs illustrate nextProbablePrime() method of BigInteger class



Example 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// nextProbablePrime() method of BigInteger
  
import java.math.BigInteger;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // BigInteger object to store the result
        BigInteger result;
  
        // For user input
        // Use Scanner or BufferedReader
  
        // object of String created
        // Holds the value to find next prime number
        String input1 = "1516132";
  
        // Creating BigInteger object
        BigInteger a
            = new BigInteger(input1);
  
        // Using nextProbablePrime()
        result = a.nextProbablePrime();
  
        // Print result
        System.out.println("The next probable"
                           + " Prime number is "
                           + result);
    }
}

chevron_right


Output:

The next probable Prime number is 1516153

Example 2: Printing all Prime number below 100

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// nextProbablePrime() method of BigInteger
  
import java.math.BigInteger;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // BigInteger object to store the result
        BigInteger result;
  
        // Creating BigInteger objects
        BigInteger a;
  
        // Printing all prime numbers
        // Below 100
        for (int i = 0; i < 100😉 {
            a = new BigInteger(
                Integer.toString(i));
  
            // Using nextProbablePrime()
            result = a.nextProbablePrime();
  
            // Print the answer
            if (Integer.parseInt(
                    result.toString())
                < 100) {
                System.out.print(result + " ");
            }
  
            i = Integer.parseInt(
                result.toString());
        }
    }
}

chevron_right


Output:

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97

Example 3: Program showing exception when value is negative.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// nextProbablePrime() method of BigInteger
  
import java.math.BigInteger;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // BigInteger object to store the result
        BigInteger result;
  
        // For user input
        // Use Scanner or BufferedReader
  
        // object of String created
        // Holds the value to find prime number
        String input1 = "-5";
  
        // Creating BigInteger objects
        BigInteger a
            = new BigInteger(input1);
  
        try {
            // Using nextProbablePrime()
            result = a.nextProbablePrime();
        }
        catch (ArithmeticException e) {
            System.out.println(e);
        }
    }
}

chevron_right


Output:

java.lang.ArithmeticException: start < 0: -5

To know about checking current BigInteger is prime or not, visit isProbablePrime() Method in Java page.

Reference: https://docs.oracle.com/en/java/javase/12/docs/api/java.base/java/math/BigInteger.html#nextProbablePrime()

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready.




My Personal Notes arrow_drop_up
Recommended Articles
Page :