Java BigInteger nextProbablePrime() Method

The nextProbablePrime() method of Java BigInteger class is used to find the next Prime Number greater than the current BigInteger. This method returns the first integer greater than this BigInteger that is probably prime.

Syntax:

Parameter:

Returns:

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

Exception:

ArithmeticException < this < 0 or this is too large.

Note:
This method will never skip over a prime when searching. If it returns p, there is no prime q such that this < q < p.
The probability that the number returned by this method is composite does not exceed 2-¹⁰⁰.

Example 1

import java.math.BigInteger;
public class BigIntegerNextProbablePrimeExample1{
public static void main(String[] args){
// create 4 BigInteger object
BigInteger big1,big2,big3,big4;
// assign value to big1,big2
big1= new BigInteger("10"); 
big2= new BigInteger("23"); 

// assign nextProbablevalue of  big1,big2 to big3,big4
big3= big1.nextProbablePrime();   
big4= big2.nextProbablePrime();   
String str1 =" Next Probable prime after "+ big1+ " is "+ big3;
String str2 =" Next Probable prime after "+ big2+ " is "+ big4;
System.out.println(str1);   
System.out.println(str2);   

}
}

Test it Now

Output:

Next Probable Prime after 10 is 11
Next Probable Prime after 23 is 29

Example 2

import java.math.BigInteger;
public class BigIntegerNextProbablePrimeExample2{
public static void main(String[] args){
// create 2 BigInteger object
BigInteger big1,big2;
// assign value to big1
big1= new BigInteger("-23"); 
// assign nextProbablePrime of  big1 to big2
big2= big1.nextProbablePrime();   
String str =" Next Probable prime after "+ big1+ " is "+ big2;
System.out.println(str);   

}
}

Test it Now

Output:

java.lang.ArithmeticException: start < 0: -23

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