20220605, 19:02  #23 
"Curtis"
Feb 2005
Riverside, CA
5,471 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
2×3^{3}×197 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
3^{2}×5×19 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
2×3×5×227 Posts 

20220606, 22:17  #27 
Apr 2020
3^{2}·5·19 Posts 

20220607, 00:37  #28  
"Seth"
Apr 2019
19·23 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
456_{8} 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
3607_{8} Posts 
Quote:


20220609, 23:11  #31  
Jul 2003
Behind BB
41·47 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
5,471 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
21_{10} 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?? 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Predict the number of digits from within the factor for M1277  sweety439  Cunningham Tables  7  20220611 11:04 
Python script for search for factors of M1277 using random kintervals  Viliam Furik  Factoring  61  20201023 11:52 
M1277  no factors below 2^65?  DanielBamberger  Data  17  20180128 04:21 