20211123, 01:14  #914 
If I May
"Chris Halsall"
Sep 2002
Barbados
2×3×1,697 Posts 

20211123, 01:19  #915 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
2·3^{2}·277 Posts 

20211123, 02:51  #916 
P90 years forever!
Aug 2002
Yeehaw, FL
2×11×353 Posts 
A recommendation for all users. Concentrate your P1 efforts on larger exponents. 30.8 has some exciting P1 developments coming. The smaller the exponent, the more P1 will benefit from the new code.
I'll rush an emergency prebeta to this group as soon as I can. 
20211123, 03:56  #917  
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
2·3^{2}·277 Posts 
Quote:
How low is "low"? With 1 exception we are down to 29.8M. Most of the effort is in the 2x.xM ranges. Last fiddled with by petrw1 on 20211123 at 04:10 Reason: How low? 

20211123, 06:08  #918 
P90 years forever!
Aug 2002
Yeehaw, FL
2·11·353 Posts 
Can you give me two similar exponents to P1 please. I'll run one on 30.7 and play with the other in 30.8.

20211123, 06:12  #919  
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
11572_{8} Posts 
Quote:
Wavefront: Pminus1=N/A,1,2,26899799,1,1000000,30000000 Pminus1=N/A,1,2,26899981,1,1000000,30000000 Smaller: Pminus1=N/A,1,2,9100033,1,1000000,30000000 Pminus1=N/A,1,2,9100051,1,1000000,30000000 

20211123, 07:52  #920  
"Tucker Kao"
Jan 2020
Head Base M168202123
2^{5}×3×7 Posts 
Quote:
I believe this will bring me some future lucks. Last fiddled with by tuckerkao on 20211123 at 07:53 

20211123, 08:13  #921 
"GIMFS"
Sep 2002
Oeiras, Portugal
2^{2}×3×127 Posts 
Ok, so I will do P1 on the 12.0M range. It will take a couple of weeks, I guess. Could you please "release" the range for me?
As for TF, I won´t be doing any in the twok ranges. My GPU is simply too slow. I´ve run several TF tests to 73 bits in the 12.9 M range, supposing no one was working there. Not a lot, and no factor found, but if Anon is reading this will probably wish to remove those work units from the worktodo file to avoid duplication. 
20211123, 12:52  #922  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
3^{3}×379 Posts 
Quote:


20211123, 15:49  #923 
"University student"
May 2021
Beijing, China
197 Posts 
M108330041 has a factor: 104618158844229118808143
M108390157 has a factor: 86145124187394692093897 6 factors found out of 340 trials! hurry on before PRP Cat 1 wavefront reaches 108.3M 
20211124, 04:31  #924 
"Seth"
Apr 2019
409 Posts 
With James's help (thanks for everything). I rigged up a P1 calculator in python and tried to optimize TF vs P1. I use a similiar methodology to what Wayne does.
If anyone is curious my code is at twok_hard.py but it needs extra data and setup. It also makes a bunch of assumptions (all exponents have the same existing B1/B2, TF success of 1/ (bits + 5), ...) that I might refine. I think it should still be a reasonable estimate of how much work is left for each range Code:
[17000000,17100000] 156 needed, current TF 2155 x 72 Existing P1 for interval greater than B1=100000, B2=2025000 => 2.0% Last P1 2155 x 9.6% @ B1=20405627 B2=413213953 0 GPU(72) + 74390.0 CPU  GHzDays/factor GPU: 0.0 CPU: 476.9  0.0x GPU/CPU Factors/Tests 0.0/0 TF + 156.0/2155 P1 @ B1=20405627 B2=413213953 Existing P1 for interval greater than B1=100000, B2=2025000 => 1.8% Last P1 2155 x 8.0% @ B1=11808812 B2=239128445 60443 GPU(73) + 43049.8 CPU  GHzDays/factor GPU: 2159.7 CPU: 336.3  1.4x GPU/CPU Factors/Tests 28.0/2155 TF + 128.0/2155 P1 @ B1=11808812 B2=239128445 Existing P1 for interval greater than B1=100000, B2=2025000 => 1.6% Last P1 2155 x 6.3% @ B1=5694836 B2=115320430 181329 GPU(74) + 20760.9 CPU  GHzDays/factor GPU: 3260.4 CPU: 206.8  8.7x GPU/CPU Factors/Tests 55.6/4310 TF + 100.4/2155 P1 @ B1=5694836 B2=115320430 Existing P1 for interval greater than B1=100000, B2=2025000 => 1.4% Last P1 2155 x 5.0% @ B1=3295622 B2=66736360 423100 GPU(75) + 12014.4 CPU  GHzDays/factor GPU: 5104.1 CPU: 164.3  35.2x GPU/CPU Factors/Tests 82.9/6465 TF + 73.1/2155 P1 @ B1=3295622 B2=66736360 Existing P1 for interval greater than B1=100000, B2=2025000 => 1.2% Last P1 2155 x 3.5% @ B1=1324436 B2=26819846 906644 GPU(76) + 4828.3 CPU  GHzDays/factor GPU: 8254.9 CPU: 104.6  187.8x GPU/CPU Factors/Tests 109.8/8620 TF + 46.2/2155 P1 @ B1=1324436 B2=26819846 Existing P1 for interval greater than B1=100000, B2=2025000 => 1.1% Last P1 2155 x 2.0% @ B1=369626 B2=7484926 1873731 GPU(77) + 1347.5 CPU  GHzDays/factor GPU: 13733.4 CPU: 68.9  1390.5x GPU/CPU Factors/Tests 136.4/10775 TF + 19.6/2155 P1 @ B1=369626 B2=7484926 3314264 GPU(1605 x 78) + 0 CPU  156/12380 TF If we do no additional TF we'll need P1 bounds around B1=20M, B2=413M to get 156 factors from 2155 P1 tests If we do one more bit level of TF it takes 60,400 GHzDays (of GPU time) and we expect to find 28 factors BUT now we can do B1=12M, B2=239M with ~8% success to find the remaining 128 factors. This takes 43,000 GHzDays (of CPU time). At the extreme we can do 3 Million GHzDays of TF (all 2134 exponents to 2^77 + ~1605 to 2^78) It looks like the most reasonable strategy is going to be TF to 75 or 76 for this range. Depending on the actual P1 data. I think the worst range is 29.8M Code:
[29800000,29900000] 91 needed, current TF 2090 x 75 For M29,800,009 2.1% P1: B1=208981 B2=4179626 Last P1 2090 x 6.7% @ B1=8264681 B2=165293637 0 GPU(75) + 53097.1 CPU  GHzDays/factor GPU: 0.0 CPU: 583.5  0.0x GPU/CPU Factors/Tests 0.0/0 TF + 91.0/2090 P1 @ B1=8264681 B2=165293637 For M29,800,009 2.1% P1: B1=268337 B2=5366746 Last P1 2090 x 5.3% @ B1=4264749 B2=85294990 267864 GPU(76) + 27399.2 CPU  GHzDays/factor GPU: 10253.2 CPU: 422.3  9.8x GPU/CPU Factors/Tests 26.1/2090 TF + 64.9/2090 P1 @ B1=4264749 B2=85294990 For M29,800,009 2.1% P1: B1=344552 B2=6891038 Last P1 2090 x 4.0% @ B1=2200700 B2=44014007 803592 GPU(77) + 14138.6 CPU  GHzDays/factor GPU: 15475.3 CPU: 361.9  56.8x GPU/CPU Factors/Tests 51.9/4180 TF + 39.1/2090 P1 @ B1=2200700 B2=44014007 For M29,800,009 2.1% P1: B1=442413 B2=8848268 1875049 GPU(78) + 5466.6 CPU  GHzDays/factor GPU: 24220.7 CPU: 402.4  343.0x GPU/CPU Factors/Tests 77.4/6270 TF + 13.6/1305 P1 @ B1=1362729.1842528547 B2=27254583.685057092 1875049 GPU(2090 x 79) + 0 CPU  91/6270 TF 
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