How do I create a user input for three integers in a range or just the stop input

[Pleiades]

Below is the code which shows Prime numbers and Mersenne Prime Numbers. It also spits out the last digit of a long number which could be prime or not. I would like the number range, "stop" to be used for user input. Any help thank you.
code part which I don't understand how to incorporate user input:

for num in range(3,30,2):

import math
# Python program to check if the input number is prime or not
  
  
def isPrime(num):
    for i in range(2, int(math.sqrt(num)+1)):
        if num % i == 0: 
            return False;
    return num>1;
  
print 2
print 3
print 3
print ("______________")
for num in range(3,30,2):
                 if isPrime(num):
                    if all(num%i!=0 for i in range(3,int(math.sqrt(num))+1, 2)):
          
                        print num
                        print  ((2**num-1)*(2**num)/2)/(2**num)*2+1
                        print ((((2**num-1)*(2**num)/2)/(2**num)*2+1+1)%10)-1
                        print ("______________")