If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
Should The Great Internet Mersenne Prime Search be considered a bad idea by that measure?
Are there any benefits to knowing prime numbers so large they can't even be used in cryptography?
No?
Then I guess it's a bad idea.