Using scratch to solve the 3x + 1 problem Look up the 3x+1 problem to find out why this is so difficult. If a number ever gets stuck for over 10 minutes, it may be a solution. Post it in the comments! You can see which number is being checked in the checking variable. About 12,000 numbers are checked per second on my Macbook pro, how many for you?
Must have scratcher to contribute to the cloud variable.
