Arasaka Tower 3D and FF06B5: How did people find the code to secret floor?

[TK]

I know FF06B5 has been solved, but...
How did people figure out that 240891 is the code to floor -10?
How did people find out about that laptop in garbage ground with all those witcher symbol and the corpse carry the shard?
Is there an proper order that you are supposed to go through to solve this mystery? (Like I started by playing the Arasaka Tower 3D first, is that right?)
Or is this a big game designed to be solved by the community all together?
Is there an article or video provide a full explain on FF06B5?

[Paranochat]

https://www.reddit.com/r/FF06B5/comments/171744c/ff06b5_20_summary_a_resolution/

Here you can find a pretty in-depth summary of what FF06B5 is, and how it was solved by the community.