If the number is odd, then multiply by (3x+1). If the number is even, then divide by 2. Stop when the number reaches 1

• when a number reaches 1, it enters an infinite loop of "1 -> 4 -> 2 -> 1 -> 4..."

Scientist have worked out that atleast the very first 2^68 digits all resolve to the number loop of "-> 4 -> 2 -> 1 -> 4...", but it has not been proven yet if this exists for all numbers

Here, I am just running through the first 10,000 digits as an exercise while learning Python

• execution time < .5 seconds
• after trying the first, 100, 500, 1000, so some values may have been stored already