Programming Examples
Java program to generate all 2 digit twisted prime number
Write a program to generate all 2 digit twisted prime number. Twisted prime number is a number which is prime and its reverse is also prime. Example 13 and 31.
Solution
class TwistedPrime
{
public static void main(String ar[])
{
int i,j,r,c1,c2,d;
for(i=10;i<=99;i++)
{
c1=0;
for(j=1;j<=i;j++)
{
if(i%j==0)
c1++;
}
r=0;
for(j=i;j>0;j/=10)
{
d=j%10;
r=r*10+d;
}
c2=0;
for(j=1;j<=r;j++)
{
if(r%j==0)
c2++;
}
if(c1==2 && c2==2)
System.out.println(i+“ ”);
}
}
}
Output