Hi, Northranger and others who've put in all the work on this - thanks for doing so!

I have a hard time removing my professor hat sometimes, so if you don't mind some writing comments on the web page text... (grin):

Main page:

"It allows to transfer money" -> It allows money to be transferred

"(depending on many factors like" -> instead of like, I'd say "such as"

I think there's something important missing from the intro blurb for people who don't let videos auto-play:  The idea that just by participating in Riecoin, users contribute in a small way to a mathematical dataset, and that this is really the feature that distinguishes it from Bitcoin.  Perhaps you could say:

It is a fork of the Bitcoin project, with a key difference:  Riecoin aims to create an interesting dataset as a useful byproduct of its operation.  Just by participating in Riecoin, you will be contributing to a dataset of dense prime clusters that may someday yield mathematical insights.


http://riecoinfoundation.org/about.html

"comprised of" -> composed of
"ensures Riecoin's" -> ensures that Riecoin's

http://riecoinfoundation.org/donate.html

Instead of "strive" I would say "thrive"

"Our foundation uses multi-signature address " -> Our foundation uses a multi-signature address