20110110, 18:49  #46 
Dec 2007
Cleves, Germany
2·5·53 Posts 
M90012887 has a factor: 439952565941844992833877634700202506740401
k1 = 3*3*5*7*11*19*52177399 k2 = 5*11*71851282747 
20110110, 19:14  #47 
Sep 2010
Annapolis, MD, USA
10111111_{2} Posts 

20110110, 19:53  #48 
Dec 2007
Cleves, Germany
2·5·53 Posts 

20110112, 17:22  #49 
Sep 2010
Scandinavia
3·5·41 Posts 

20110112, 17:53  #50 
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
10B7_{16} Posts 
Why not? There's no reason a number can't have two factors that happen to have the same bit length. There's probably about a 1/4900 (70^(2)) chance that any particular Mersenne number has two factors that are 70 bits long, so it should be rare, but it's possible.

20110112, 18:27  #51  
Sep 2010
Scandinavia
1001100111_{2} Posts 
Quote:
I wouldn't have been surprised to see a composite factor found by P1. 

20110112, 18:43  #52  
Jun 2003
12474_{8} Posts 
Quote:


20110112, 19:41  #53 
Banned
"Luigi"
Aug 2002
Team Italia
1001011111001_{2} Posts 

20110112, 19:59  #54 
Sep 2010
Scandinavia
3·5·41 Posts 
Why multiply them, instead of reporting them as they are found?

20110112, 20:48  #55 
Jun 2003
2^{2}×3^{2}×151 Posts 

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