Yes, it would take days. I am not in a rush, nor trying to solve any problem...I just like Maths.
There is a video floating around (citation/source to come) of someone doing the first round of SHA-256 by hand. It seems straight forward, but I have no idea what the second round looks like. Do I use the old values from the last round? Do I use more chunks of the plaintext?
Please don't just quote Wikipedia pseudocode at Me...I already read it. Did. Not. Help.
I'll update when I find a link to the video. Thanks.