20131028, 04:07  #12 
If I May
"Chris Halsall"
Sep 2002
Barbados
11087_{10} Posts 

20131028, 05:54  #13 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
5·2,179 Posts 

20131028, 09:51  #14 
Romulan Interpreter
"name field"
Jun 2011
Thailand
24051_{8} Posts 
Mine just went out of top some weeks ago, at ~103.xx bits.

20131028, 11:57  #15 
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
11·389 Posts 
It can find a composite factor, but those are not generally thought of as being as impressive as a prime factor of the same size. I doubt composite factors are included on GPUto72's "largest 100 factors found" list and, in any case, all of the largest factors mentioned here have been prime.

20131028, 15:07  #16 
Just call me Henry
"David"
Sep 2007
Liverpool (GMT/BST)
37·163 Posts 
Most of these aren't twice the size of the tf depth so they will be prime

20131028, 17:59  #17 
May 2013
East. Always East.
11×157 Posts 
Well I was noticing that some of the absolutely massive ones might be but even The Judger's record on GPU72 of 146.45 is too small as it would be 74 + 72.45 and both would have likely been found since his exponent should be TF'ed to 74.
On the other hand, the one George mentioned is 2^{173.5} which could easily be a composite factor. That's why I had asked about the prime or composite factor. I hope it's composite because that IS impressive. 
20131028, 18:01  #18 
P90 years forever!
Aug 2002
Yeehaw, FL
17744_{8} Posts 

20131029, 02:30  #19  
Romulan Interpreter
"name field"
Jun 2011
Thailand
3·23·149 Posts 
Quote:
Code:
gp > log(426315489966437174530195419710289226952407399)/log(2) %1 = 148.2567576509223079601764086 gp > log(17504141 426315489966437174530195419710289226952407399)/log(2) %2 = 173.5479572338198927251262281 gp > isprime(426315489966437174530195419710289226952407399) %3 = 1 gp > isprime(17504141 426315489966437174530195419710289226952407399) %4 = 0 gp > 

20131029, 04:39  #20 
May 2013
East. Always East.
11×157 Posts 
Oh. I thought that was a typo in the factor. I didn't notice that space separated the exponent and factor.

20131029, 06:11  #21  
Romulan Interpreter
"name field"
Jun 2011
Thailand
2829_{16} Posts 
Quote:
I never give the exponent when I talk about a factor (see "factors found" threads) of mersenne numbers. The exponent is trivial to find if you know the factor. 

20131029, 21:18  #22  
"Oliver"
Mar 2005
Germany
1114_{10} Posts 
Quote:
Quote:
Oliver 

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