20220605, 19:02  #23 
"Curtis"
Feb 2005
Riverside, CA
1010110110000_{2} Posts 
My source for 3* t65 is Ryan's post here:
https://mersenneforum.org/showpost.p...5&postcount=57 Where he believes he completed a t70 over a year ago. 3* t65 is about half a t70, so I was being conservative with my "guarantee", since I figure if Ryan thinks he did a t70 he surely finished half of one at minimum (plus all the other ECM work that everyone else has done, which might be close to a T65 by now). 
20220605, 21:02  #24  
If I May
"Chris Halsall"
Sep 2002
Barbados
2A73_{16} Posts 
Quote:
While a bit "lengthy", it sums things up nicely and understandably for the layperson (of which I am in this domain). IMO, this on par to an Economist (the newspaper) article. As in, deeply researched, well thought, and clearly argued. 

20220605, 23:17  #25  
Apr 2020
5^{3}·7 Posts 
t65 = expected amount of ECM effort to find a 65digit factor, if one exists. See here for the actual curve counts.
Quote:
Exercise for the reader: run a single curve at B1=29e8, using GMPECM for stage 2; then multiply the time taken by 115153 to estimate the total CPUtime for Ryan's t70, which probably makes up at least 50% of the total ECM done on M1277. 

20220606, 17:34  #26 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
2^{3}×7×127 Posts 

20220606, 22:17  #27 
Apr 2020
5^{3}×7 Posts 

20220607, 00:37  #28  
"Seth"
Apr 2019
11·43 Posts 
Quote:
Rerunning my numbers I get a slightly different result (using Dickman's function t65  t70: 6% t70  t75: 6.6% t75  t80: 7.3% Assuming Ryan has completed most of t70 / t75 we'll see maybe 10% probability of an ECM factor over the next ~10 years assuming GPUs get faster... 

20220608, 21:29  #29 
Mar 2019
2·5·31 Posts 
All this talk of fuzz testing weird/nonstandard inputs to GMPECM (including kriesel's essays) should be moved to another thread. This thread is about factoring M1277.

20220609, 14:28  #30  
Jul 2003
Behind BB
1,949 Posts 
Quote:


20220609, 23:11  #31  
Jul 2003
Behind BB
1,949 Posts 
Quote:
Here's the M947 effort, too! Last fiddled with by masser on 20220609 at 23:27 

20220609, 23:51  #32 
"Curtis"
Feb 2005
Riverside, CA
12660_{8} Posts 
Interested potentialfactorers / readers may want to review the previous M1277factoring thread: https://www.mersenneforum.org/showthread.php?t=23280

20220610, 13:21  #33 
May 2022
3×7 Posts 
first off hang on where the heck did like 5 pages of responses go?
second, this isnt related (i dont feel like a new thread) but why doesn't mprime (Mac) use up 100% of the cpu? I thought it was designed to do that?? 
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