Java.math.BigInteger.nextProbablePrime() Method

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Description

The java.math.BigInteger.nextProbablePrime() returns the first integer greater than this BigInteger that is probably prime. The probability that the number returned by this method is composite does not exceed 2-100.

This method will never skip over a prime when searching: if it returns p, there is no prime q such that this < q < p.

Declaration

Following is the declaration for java.math.BigInteger.nextProbablePrime() method

public BigInteger nextProbablePrime()

Parameters

  • NA

Return Value

This method returns the first integer greater than this BigInteger that is probably prime.

Exception

  • ArithmeticException - if this < 0

Example

The following example shows the usage of math.BigInteger.nextProbablePrime() method

package com.tutorialspoint;

import java.math.*;

public class BigIntegerDemo {

public static void main(String[] args) {

        // create 2 BigInteger objects
        BigInteger bi1, bi2;

        bi1 = new BigInteger("20");

        // assign nextProbablePrime value of bi1 to bi2
	bi2 = bi1.nextProbablePrime();

        String str = "Next probable prime after " + bi1 +" is " +bi2;

	// print bi2 value
	System.out.println( str );
    }
}

Let us compile and run the above program, this will produce the following result:

Next probable prime after 20 is 23



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