Twisted prime number
If given number and reversed number are prime number means that is Twisted prime number.
Example-1:
Input : n = 17 Output : Twisted prime number Explain : 17 is prime number and 71 also prime number.So It's Twisted prime number.
Example-2:
Input : n = 23 Output : Not a Twisted prime number Output : 23 is prime number but 32 is not a prime number.So It's Not a Twisted prime number.
Solution
public class Main
{
public static void main(String [] args)
{
int num = 13;
if(isPrime(num))
{
int reverse = 0;
while(num!=0)
{
reverse = (reverse*10) + (num%10);
num = num/10;
}
if(isPrime(reverse))
{
System.out.print("Twisted prime number");
}
else
{
System.out.print("Not a Twisted prime number");
}
}
else
{
System.out.print("Not a Twisted prime number");
}
}
public static boolean isPrime(int n)
{
for(int i=2;i<n;i++)
{
if(n % i == 0)
{
return false;
}
}
return true;
}
}
n = 13
m = str(n)[::-1]
m = int(m)
k = 0
for i in range(2,n):
if(n % i == 0):
break
else:
k += 1
for j in range(2,m):
if(m % j == 0):
break
else:
k += 1
if(k==2):
print("Twisted prime number")
else:
print("Not a Twisted prime number")
Output
Twisted prime number