Python: Problem with raw_input reading a number

unfortunately raw_input is not doing what I need it to do. What I am trying to do is get totPrimes = whatever I type in at the prompt. If i replace while count < totPrimes with while count < 50 this script works. If I type 50 into the prompt, this script doesnt work, I’m afraid raw_input isn’t the function im looking to use? Here is a snippet of my code: