# Java BigInteger Class | nextProbablePrime() Method with Example

BigInteger Class nextProbablePrime() method: Here, we are going to learn about the nextProbablePrime() method of BigInteger Class with its syntax and example.
Submitted by Preeti Jain, on May 11, 2020

## BigInteger Class nextProbablePrime() method

• nextProbablePrime() method is available in java.math package.
• nextProbablePrime() method is used to get the next probable prime number that should be higher than this BigInteger and there is a limit of composite number that should not exceed 2 pow(-100).
• nextProbablePrime() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• nextProbablePrime() method may throw an exception at the time of returning the next probable prime number.
ArithmeticException: This exception may throw when the value of this BigInteger is negative.

Syntax:

```    public BigInteger nextProbablePrime();
```

Parameter(s):

• None

Return value:

The return type of this method is BigInteger, it returns BigInteger that holds the value larger than this BigInteger and it is probably prime.

Example:

```// Java program to demonstrate the example
// of BigInteger nextProbablePrime() method of BigInteger

import java.math.*;

public class NextProbablePrimeOfBI {
public static void main(String args[]) {
// Initialize two variables str1 and str2
String str1 = "13";
String str2 = "6";

// Initialize two BigInteger objects
BigInteger b_int1 = new BigInteger(str1);
BigInteger b_int2 = new BigInteger(str2);

// returns the next prime number
// of this BigInteger b_int1 so the value of
// this BigInteger is 13 then the next prime
// after 13 is 17
BigInteger next_prime = b_int1.nextProbablePrime();
System.out.println("b_int1: " + b_int1);
System.out.println("b_int1.nextProbablePrime(): " + next_prime);

System.out.println();

// returns the next prime number
// of this BigInteger b_int2 so the value of
// this BigInteger is 6 then the next prime
// after 6 is 7
next_prime = b_int2.nextProbablePrime();
System.out.println("b_int2: " + b_int2);
System.out.println("b_int2.nextProbablePrime(): " + next_prime);
}
}
```

Output

```b_int1: 13
b_int1.nextProbablePrime(): 17

b_int2: 6
b_int2.nextProbablePrime(): 7
```