I need to know if I am crazy or not. I have a modified version of the fast-doubling algorithm calculating the Fibonacci sequence. That's all that this algorithm is doing, just a modified version. My point is not the Fibonacci Sequence. My point is that my script is able to run the fast-doubling algorithm all the way up to the 2020th number inside of the sequence in 1 second. That number has 2020 digits inside of it. Here's a video of it happening: Exponential fast-doubling algorithm - YouTube[^] Remember: This is purely using a modifed version of the fast doubling method and it is synchronized within time down to the .0001 second. I need to know if I am crazy or not. Has this ever been done before? Note: It barely uses any of my CPU up. Thank you all.