Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
What is the highest prime number that is a factor of 4^17 - [#permalink]
24 Aug 2007, 17:36
0% (00:00) correct
0% (00:00) wrong based on 1 sessions
What is the highest prime number that is a factor of 4^17 - 2^28?
Folks this problem I have spent one hour on trying to find a way to solve under 2 minutes. I am absolutely boggled by how to do it. Please tell me this is a difficult problem, maybe even a very difficult one.