20130309, 04:39  #1  
"Jason Goatcher"
Mar 2005
3×7×167 Posts 
Prime pages question
Following is a copy of the listing of the largest 10 prime numbers known by the world at large. You'll notice that the first 6 have question marks, meaning it hasn't been absolutely 100% confirmed that they are the 43rd to 48th Mersenne primes. It HAS been confirmed that they're prime, and that they're Mersenne numbers, it just hasn't been confirmed that there aren't any Mersenne primes below them.
Now, my question is whether or not there's a technical reason why some have 2 question marks and some have only one. I understand that the 2 question marked ones are more in doubt, but is there some sort of hard and fast rule that determines when you take away one of the 2 question marks? Quote:


20130309, 06:45  #2 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
7221_{10} Posts 
Not all exponents below M48 have been tested once, which is what the ?? is supposed to mean. All first time tests below M47 were only recently completed, and the table merely hasn't been updated. (That is, 4347 should all be ? while 48 should be ??.)

20130309, 06:49  #3 
Romulan Interpreter
"name field"
Jun 2011
Thailand
10011100101100_{2} Posts 

20130309, 08:09  #4 
Banned
"Luigi"
Aug 2002
Team Italia
4843_{10} Posts 

20130309, 08:16  #5 
Romulan Interpreter
"name field"
Jun 2011
Thailand
2^{2}×23×109 Posts 

20130309, 08:44  #6 
Banned
"Luigi"
Aug 2002
Team Italia
29·167 Posts 

20130309, 12:04  #7 
"Jason Goatcher"
Mar 2005
3·7·167 Posts 
lol, fine, I don't get an A+ for my post. But, honestly, did people really think I hadn't just accidentally left some terms out? :)

20130309, 12:10  #8 
Romulan Interpreter
"name field"
Jun 2011
Thailand
2^{2}×23×109 Posts 
No, they don't. It was nitpicking. But it was fun, because it did collateral damages too

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