20080916, 22:46  #749 
Bemusing Prompter
"Danny"
Dec 2002
California
2^{3}×3^{3}×11 Posts 
Here's another article from Scientific American: http://www.sciam.com/blog/60second...cl20080916

20080916, 22:53  #750  
Einyen
Dec 2003
Denmark
2^{2}·769 Posts 
Quote:
Perfectnumbers+1 are not prime either: p=37156667: 2^(p1)*(2^p1)+1 factors: 7,11,44753,202577,1282451377 p=43112609: 2^(p1)*(2^p1)+1 factors: 7,211,70121,71647,1846524311 checked up to 10^10. 

20080916, 22:55  #751 
Einyen
Dec 2003
Denmark
2^{2}×769 Posts 
I would like to finish the gaps too, but thats considered "poaching", since old slow computers working on low first time numbers. If someone decides something, I'm interested.
Last fiddled with by ATH on 20080916 at 22:55 
20080916, 23:47  #752 
May 2005
Argentina
2·3·31 Posts 

20080917, 00:20  #753  
Einyen
Dec 2003
Denmark
2^{2}×769 Posts 
Quote:
3  2^43112609+1 Actually operating modulo 3: 2^{odd}+1 = 2*2^{even}+1 = 2*(2^2)^{even/2}+1 = 2*1^{even/2}+1 = 0 (mod 3) Last fiddled with by ATH on 20080917 at 00:20 

20080917, 01:02  #754 
Dec 2003
Hopefully Near M48
3336_{8} Posts 
The first known million digits prime was discovered on June 1, 1999. The $50,000 EFF prize was awarded on April 6, 2000, 310 days later.
At that rate, the $100,000 EFF prize will be awarded on June 29, 2009. Does anyone know when the M38 discovery was published and in what journal? 
20080917, 01:30  #755 
Aug 2008
Ottawa, Canada
7 Posts 
Listen to Jeff Gilchrist!
For those interested in hearing the interview with Jeff Gilchrist, go to http://www.cbc.ca/radio/ and click on the "Pacific" link beside "Listen Live  Radio One". Jeff will be on approximately 20 minutes from now.

20080917, 01:49  #756 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
41·229 Posts 
Great show, Jeff! I've listened to the whole number... (rewound all the other stuff though)
"...you can continue now..." Very nice! Thanks! P.S. I guess I have a time machine! Nah, I rented it from CBC... just go to http://www.cbc.ca/asithappens/latestshow.html and use all three parts. The marker for the 1st part would be about 22:00 into the part, then ~15:30 into the 2nd part and the very end of part III. Last fiddled with by Batalov on 20080917 at 01:58 
20080917, 01:50  #757 
Aug 2008
Ottawa, Canada
7_{10} Posts 
One minute until Jeff's segment. (See listening instructions in my previous post.)

20080917, 02:09  #758 
Bemusing Prompter
"Danny"
Dec 2002
California
2^{3}×3^{3}×11 Posts 
In case anyone hasn't seen my post in the other thread, I've started an article on Wikinews: http://en.wikinews.org/wiki/Two_larg...or_$100k_prize
Feel free to improve it, but please make sure it's accurate! Last fiddled with by ixfd64 on 20080917 at 02:09 
20080917, 02:29  #759 
Dec 2003
Hopefully Near M48
6DE_{16} Posts 

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