79 FREE

JAVA CODE ::

import java.io.*;

import java.math.*;

class P442

{

public static void main(String args[])

{

    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

    long i=0L,c=0L,d=0L;

    P442 obj=new P442();

    for(i=1L;;i++)

    {

        if(obj.fun(i,1)==1)

        {

            d=i;

            c++;

        }

        if((i<0)||(d<0)||(c<0))

            break;

        if(c==10000000L)

            break;

    }

    System.out.println(i+"          "+d);

}

long fun(long x,long n)

{

    int v=0,w=0;

    long p=0,q=0,a=0,t=0,b=0;

    q=(long)Math.pow(79,n);

    if(q>x)

        return 1;

    String s=""+x,k=""+q,d="";

    a=(long)s.length();

    t=(long)k.length();

    for(p=0;p<=a-t;p++)

    {

        v=(int)p;

        w=(int)(p+t);

        d=s.substring(v,w);

        b=Long.parseLong(d);

        if(b==q)

            return 0;

    }

    return fun(x,n+1);

}

}

OUTPUT::

--------------------Configuration: <Default>--------------------

10618506 10618506

Process completed.

Thus the answer is 668 ...

I was very much mesmerised by the problem in Project Euler and I used this same code with modifications to solve the problem given in the problem link but my program ran for 25 mins and then there was the alarm when the CPU temperature crossed 45 degree celsius , so I couldnt answer that problem ...