20211021, 07:44  #1 
"University student"
May 2021
Beijing, China
2·5^{3} Posts 
Getting <2k unfactored exponents for 108.3M
Currently https://www.mersenne.ca/status/tf/0/0/4/10800 shows that there are 2096 unfactored exponents. However, with the expected 4% probability of finding a factor in P1, we may still have 2020 unfactored, and the range will fall into that "twok" project. At that time, no PRP tests could be saved by finding a factor.
Most of the exponents in that range are TFed to 2^76, some to 2^77 (all by me). But my power is just too small. (ETA is 2 years) So does anyone want to help? You ca help by either doing TF or P1. Some recommended bounds: TF to 2^77, then run P1 with B1=1300000, B2=60000000 TF to 2^78, then P1 with B1=800000,B2=32000000 I recommend the latter if you have RTX 20xx/30xx. (P.S. I don't consider doing P1 before the last bit level of TF a good choice, because Primenet may release the PRP assignment right after receiving NFPM1 results.) Last fiddled with by Zhangrc on 20211021 at 08:04 
20211021, 17:40  #2  
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
3×11×157 Posts 
Quote:
My thoughts: Most of the P1 and PRP is being done by Ben Delo. His P1 bounds currently have a 4.7% expected success rate. Like this one at 106M: Code:
Ben Delo 106677187 NFPM1 20211021 10:39 11.6 21.8254 B1=878000, B2=52123000 At the same time, if the TF horsepower is available it would be best if TF was at 77 before PRP gets there. What I am seeing in the higher 107M ranges is that most exponents are getting TF to 77. If that holds then 108.3M should be fine. So if it was up to me I would wait and see what is left when the P1/PRP finishes that range (could be a couple months) and then if any are left, then either P1 any that were missed or TF more to 77. 

20211021, 23:49  #3  
"University student"
May 2021
Beijing, China
2×5^{3} Posts 
Yes, but there are only 1700 unverified exponents in that range. Even if Ben Delo does two third of the work, the average probability is about 4.4%, so still about 15 to go. That could be done by TF to 77 (some to 78).
Quote:
(Once a exponent is tested and verified, I will no longer factor it.) Last fiddled with by Zhangrc on 20211021 at 23:56 

20211021, 23:59  #4 
If I May
"Chris Halsall"
Sep 2002
Barbados
31·337 Posts 

20211022, 00:04  #5  
"University student"
May 2021
Beijing, China
2×5^{3} Posts 
Quote:
My conputing power is too weak to finish 108.3M on time. Anyone want to help? Last fiddled with by Zhangrc on 20211022 at 00:06 

20211022, 00:10  #6  
"Tucker Kao"
Jan 2020
Head Base M168202123
2·5·73 Posts 
Quote:
Last fiddled with by tuckerkao on 20211022 at 00:11 

20211022, 00:21  #8 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
3×11×157 Posts 
With luck my GPU will free up in a few weeks.
With bad luck it could be 8. Cross your fingers. Keep in mind though all PRPs (or almost all) are preceded by P1 so there shouldn't by many "wasted" PRPs. 
20211022, 00:22  #9 
If I May
"Chris Halsall"
Sep 2002
Barbados
10100011001111_{2} Posts 

20211022, 00:34  #10  
"Tucker Kao"
Jan 2020
Head Base M168202123
2·5·73 Posts 
Quote:
The recommended bounds should be more like: TF to 2^77, then P1 with B1=800000,B2=32000000 TF to 2^78, then P1 with B1=1300000, B2=60000000 The higher TF bit level has to match the larger P1 bounds. I have Geforce GTX 780, so that's below your latter. I won't be able to meet your time. I don't understand the needs for the extra TF levels after the GPU72 recommendations. If 2^76 to 2^77 is truly needed, it's that PrimeNet server which should be updated, so it'll assign an additional level to all the TF users to work on. Quote:
I definitely agree that the recommended bit levels should increase after Nvidia releases the Lovelace Geforce 4000 series in Q4 2022. Last fiddled with by tuckerkao on 20211022 at 01:06 

20211022, 02:42  #11 
"Tucker Kao"
Jan 2020
Head Base M168202123
1332_{8} Posts 
I actually have worked on an exponent in M108.3M a while ago which was M108377323
Because I submitted the results manually, the server assigned the exponent to curtisc even without the P1. I think I can help M108285523 and M108366523, these 2 look more like my numbers. Last fiddled with by tuckerkao on 20211022 at 03:25 
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