Java - Error con BigInteger

import java.util.Scanner;

import java.math.BigInteger;

public class Primos{

public static void main(String args[]){

   Scanner usuario = new Scanner(System.in);

   BigInteger b;

   BigInteger c;

   BigInteger d = new BigInteger("1");

   BigInteger e = new BigInteger("2");

   BigInteger f = new BigInteger("3");

   BigInteger g = new BigInteger("5");

   BigInteger h = new BigInteger("7");

   System.out.println("********************************************************");

   System.out.println("*  Bienvenido al programa que le encuentra los primos  *\n*  de un rango que usted mismo determina               *");

   System.out.println("********************************************************");

   System.out.println("Digite el valor minimo del rango");

   b = usuario.nextBigInteger();

   System.out.println("Digite el valor maximo del rango");

   c = usuario.nextBigInteger();

   System.out.println("Los numeros primos que estan dentro de su rango son: ");

   while(b.compareTo(c)<=0){

   int i = b.compareTo(d);

   int j = b.compareTo(e);

   int k = b.compareTo(f);

   int l = b.compareTo(g);

   int m = b.compareTo(h);

    if(j==0 || k==0 || l==0 || m==0){

     System.out.print(b + " ");

   }else{

     e=b.mod(e);

     f=b.mod(f);

     g=b.mod(g);

     h=b.mod(h);

     i = e.compareTo(d);

     j = f.compareTo(d);

     k = g.compareTo(d);

     l = h.compareTo(d);

      if(i==0 && j>=0 && k>=0 && l>=0){

     System.out.print(b + " ");

    }else{

    }

   }

    b=b.add(d);

  }

 }

}

public BigInteger mod(BigInteger m) {

    if (m.signum <= 0)

        throw new ArithmeticException("BigInteger: modulus not positive");

    BigInteger result = this.remainder(m);

    return (result.signum >= 0 ? result : result.add(m));

}