20210421, 17:35  #397  
Jun 2003
4962_{10} Posts 
Quote:
Last fiddled with by axn on 20210421 at 17:35 

20210421, 18:00  #398 
"James Heinrich"
May 2004
exNorthern Ontario
2^{5}·3·5·7 Posts 
This is crude, but I have created a placeholder page to list what known P+1 efforts have been recorded:
https://www.mersenne.ca/pplus1.php Note of course that my data will always be up to 24h out of date (synch'ed just after midnight UTC). Will get a better report on mersenne.org (at least if George can email me where to find the P+1 data). 
20210421, 18:51  #399  
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
3^{2}·5·103 Posts 
Quote:


20210421, 19:02  #400  
If I May
"Chris Halsall"
Sep 2002
Barbados
9574_{10} Posts 
Quote:
Code:
[Main thread Apr 21 13:11] Mersenne number primality test program version 30.6 [Main thread Apr 21 13:11] Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 6x256 KB, L3 cache size: 12 MB [Main thread Apr 21 13:11] Starting worker. [Comm thread Apr 21 13:11] Updating computer information on the server [Work thread Apr 21 13:11] Worker starting [Work thread Apr 21 13:11] Setting affinity to run worker on CPU core #1 [Work thread Apr 21 13:11] [Work thread Apr 21 13:11] P+1 on M42600139 with B1=400000, B2=TBD [Work thread Apr 21 13:12] Setting affinity to run helper thread 5 on CPU core #6 [Work thread Apr 21 13:12] Setting affinity to run helper thread 4 on CPU core #5 [Work thread Apr 21 13:12] Setting affinity to run helper thread 3 on CPU core #4 [Work thread Apr 21 13:12] Using FMA3 FFT length 2304K, Pass1=384, Pass2=6K, clm=2, 6 threads [Work thread Apr 21 13:12] Setting affinity to run helper thread 2 on CPU core #3 [Work thread Apr 21 13:12] Setting affinity to run helper thread 1 on CPU core #2 [Work thread Apr 21 13:12] M42600139 stage 1 is 1.00% complete. Time: 42.031 sec. [Work thread Apr 21 13:13] M42600139 stage 1 is 2.16% complete. Time: 42.031 sec. [Work thread Apr 21 13:14] M42600139 stage 1 is 3.31% complete. Time: 42.133 sec. [Work thread Apr 21 14:11] M42600139 stage 1 is 96.63% complete. Time: 42.167 sec. [Work thread Apr 21 14:11] M42600139 stage 1 is 97.80% complete. Time: 42.217 sec. [Work thread Apr 21 14:12] M42600139 stage 1 is 98.90% complete. Time: 42.254 sec. [Work thread Apr 21 14:13] M42600139 stage 1 complete. 1020144 transforms. Time: 2152.052 sec. [Work thread Apr 21 14:13] Stage 1 GCD complete. Time: 8.352 sec. [Work thread Apr 21 14:13] With trial factoring done to 2^75, optimal B2 is 42*B1 = 16800000. [Work thread Apr 21 14:13] Chance of a new factor assuming no ECM has been done is 0.274% [Work thread Apr 21 14:13] D: 630, relative primes: 1439, stage 2 primes: 1045406, pair%=94.24 [Work thread Apr 21 14:13] Using 26374MB of memory. [Work thread Apr 21 14:13] Stage 2 init complete. 4243 transforms. Time: 13.237 sec. [Work thread Apr 21 14:14] M42600139 stage 2 is 1.67% complete. Time: 35.680 sec. [Work thread Apr 21 14:14] M42600139 stage 2 is 3.35% complete. Time: 35.685 sec. [Work thread Apr 21 14:15] M42600139 stage 2 is 5.05% complete. Time: 35.688 sec. [Work thread Apr 21 14:46] M42600139 stage 2 is 95.36% complete. Time: 35.681 sec. [Work thread Apr 21 14:47] M42600139 stage 2 is 97.08% complete. Time: 35.682 sec. [Work thread Apr 21 14:47] M42600139 stage 2 is 98.79% complete. Time: 35.678 sec. [Work thread Apr 21 14:48] M42600139 stage 2 complete. 1154122 transforms. Time: 2060.598 sec. [Work thread Apr 21 14:48] Stage 2 GCD complete. Time: 8.313 sec. [Work thread Apr 21 14:48] M42600139 completed P+1, B1=400000, B2=16800000, Wi8: 4F3C1C20 [Comm thread Apr 21 14:48] Sending result to server: UID: wabbit/rdt1, M42600139 completed P+1, B1=400000, B2=16800000, Wi8: 4F3C1C20 

20210421, 19:17  #401 
Apr 2010
Over the rainbow
2^{2}×641 Posts 
So, 1H30 for a 0.274% chance of finding a factor?
Should one run a normal P+1 (3 tries) , 5 H for a less than a percent chance of finding a factor? It is indeed very low. 
20210421, 19:29  #402 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
3^{2}×5×103 Posts 
And unless P+1 takes into account how much P1 has already been done it will be lower yet.
Or is prior P1 not relevant to the success rate if P+1. Last fiddled with by petrw1 on 20210421 at 19:29 
20210421, 19:33  #403 
P90 years forever!
Aug 2002
Yeehaw, FL
2^{2}×1,873 Posts 

20210421, 19:35  #404 
P90 years forever!
Aug 2002
Yeehaw, FL
1110101000100_{2} Posts 
You'll get better chances with smaller exponents  less TF has been done. I was getting 1+% estimates in the 4.7M range with B1=1000000.

20210421, 20:00  #405  
P90 years forever!
Aug 2002
Yeehaw, FL
2^{2}·1,873 Posts 
Quote:
Now that I've fixed the crash bug reading stage 2 save file, I'll gather some of this data and post it here. Last fiddled with by Prime95 on 20210421 at 20:41 

20210421, 20:11  #406 
P90 years forever!
Aug 2002
Yeehaw, FL
2^{2}×1,873 Posts 
31M expo, TF'ed to 2^75
Code:
[Apr 21 16:05] P+1 on M31500457 with B1=250000, B2=5000000 [Apr 21 16:05] Chance of finding a factor assuming no ECM has been done is an estimated 0.16% [Apr 21 16:06] P+1 on M31500457 with B1=250000, B2=10000000 [Apr 21 16:06] Chance of finding a factor assuming no ECM has been done is an estimated 0.194% [Apr 21 16:06] P+1 on M31500457 with B1=250000, B2=20000000 [Apr 21 16:06] Chance of finding a factor assuming no ECM has been done is an estimated 0.232% [Apr 21 16:06] P+1 on M31500457 with B1=500000, B2=10000000 [Apr 21 16:06] Chance of finding a factor assuming no ECM has been done is an estimated 0.261% [Apr 21 16:07] P+1 on M31500457 with B1=500000, B2=20000000 [Apr 21 16:07] Chance of finding a factor assuming no ECM has been done is an estimated 0.313% [Apr 21 16:07] P+1 on M31500457 with B1=500000, B2=40000000 [Apr 21 16:07] Chance of finding a factor assuming no ECM has been done is an estimated 0.37% [Apr 21 16:08] P+1 on M31500457 with B1=1000000, B2=20000000 [Apr 21 16:08] Chance of finding a factor assuming no ECM has been done is an estimated 0.399% [Apr 21 16:08] P+1 on M31500457 with B1=1000000, B2=40000000 [Apr 21 16:08] Chance of finding a factor assuming no ECM has been done is an estimated 0.475% [Apr 21 16:08] P+1 on M31500457 with B1=1000000, B2=80000000 [Apr 21 16:08] Chance of finding a factor assuming no ECM has been done is an estimated 0.556% 
20210421, 20:12  #407 
If I May
"Chris Halsall"
Sep 2002
Barbados
2·4,787 Posts 
Initial emprical data from five runs...
These next four runs (with different B1s as given by axn) were run on GCE 8 vcore instances with 30G of RAM available to them:
Code:
[Work thread Apr 21 17:19] P+1 on M42600221 with B1=500000, B2=TBD [Work thread Apr 21 17:19] Setting affinity to run helper thread 2 on CPU core #3 [Work thread Apr 21 17:19] Using AVX512 FFT length 2240K, Pass1=128, Pass2=17920, clm=4, 4 threads [Work thread Apr 21 17:19] Setting affinity to run helper thread 3 on CPU core #4 [Work thread Apr 21 17:19] Setting affinity to run helper thread 1 on CPU core #2 [Work thread Apr 21 17:20] M42600221 stage 1 is 0.78% complete. Time: 35.714 sec. [Work thread Apr 21 18:28] M42600221 stage 1 complete. 2177465 transforms. Time: 4116.695 sec. [Work thread Apr 21 18:28] Stage 1 GCD complete. Time: 11.694 sec. [Work thread Apr 21 18:28] With trial factoring done to 2^75, optimal B2 is 44*B1 = 22000000. [Work thread Apr 21 18:28] Chance of a new factor assuming no ECM has been done is 0.321% [Work thread Apr 21 18:28] D: 630, relative primes: 1683, stage 2 primes: 1347723, pair%=95.30 [Work thread Apr 21 18:28] Using 29991MB of memory. [Work thread Apr 21 18:28] Stage 2 init complete. 4961 transforms. Time: 21.750 sec. [Work thread Apr 21 18:29] M42600221 stage 2 is 1.30% complete. Time: 33.963 sec. [Work thread Apr 21 19:08] M42600221 stage 2 is 99.03% complete. Time: 32.330 sec. [Work thread Apr 21 19:09] M42600221 stage 2 complete. 1474580 transforms. Time: 2416.992 sec. [Work thread Apr 21 19:09] Stage 2 GCD complete. Time: 11.498 sec. [Work thread Apr 21 19:09] M42600221 completed P+1, B1=500000, B2=22000000, Wi8: 4F793D3E [Comm thread Apr 21 19:09] Sending result to server: UID: ***/GCE_2, M42600221 completed P+1, B1=500000, B2=22000000, Wi8: 4F793D3E [Work thread Apr 21 17:19] P+1 on M42600289 with B1=600000, B2=TBD [Work thread Apr 21 17:20] M42600289 stage 1 is 0.64% complete. Time: 36.778 sec. [Work thread Apr 21 18:40] M42600289 stage 1 is 99.56% complete. Time: 37.153 sec. [Work thread Apr 21 18:40] M42600289 stage 1 complete. 2614375 transforms. Time: 4828.669 sec. [Work thread Apr 21 18:40] Stage 1 GCD complete. Time: 11.328 sec. [Work thread Apr 21 18:40] With trial factoring done to 2^75, optimal B2 is 46*B1 = 27600000. [Work thread Apr 21 18:40] Chance of a new factor assuming no ECM has been done is 0.364% [Work thread Apr 21 18:40] D: 630, relative primes: 1683, stage 2 primes: 1669036, pair%=95.27 [Work thread Apr 21 18:40] Using 29992MB of memory. [Work thread Apr 21 18:40] Stage 2 init complete. 4961 transforms. Time: 20.257 sec. [Work thread Apr 21 18:41] M42600289 stage 2 is 1.05% complete. Time: 31.121 sec. [Work thread Apr 21 19:28] M42600289 stage 2 is 99.59% complete. Time: 31.242 sec. [Work thread Apr 21 19:28] M42600289 stage 2 complete. 1827707 transforms. Time: 2857.538 sec. [Work thread Apr 21 19:28] Stage 2 GCD complete. Time: 11.302 sec. [Work thread Apr 21 19:28] M42600289 completed P+1, B1=600000, B2=27600000, Wi8: 4FBB23DF [Comm thread Apr 21 19:28] Sending result to server: UID: ***/GCE_1, M42600289 completed P+1, B1=600000, B2=27600000, Wi8: 4FBB23DF [Work thread Apr 21 17:20] P+1 on M42600367 with B1=700000, B2=TBD [Work thread Apr 21 17:20] M42600367 stage 1 is 0.53% complete. Time: 36.484 sec. [Work thread Apr 21 18:53] M42600367 stage 1 is 99.83% complete. Time: 36.878 sec. [Work thread Apr 21 18:53] M42600367 stage 1 complete. 3048479 transforms. Time: 5579.300 sec. [Work thread Apr 21 18:53] Stage 1 GCD complete. Time: 11.253 sec. [Work thread Apr 21 18:53] With trial factoring done to 2^75, optimal B2 is 47*B1 = 32900000. [Work thread Apr 21 18:53] Chance of a new factor assuming no ECM has been done is 0.401% [Work thread Apr 21 18:53] D: 630, relative primes: 1683, stage 2 primes: 1969321, pair%=95.19 [Work thread Apr 21 18:53] Using 29994MB of memory. [Work thread Apr 21 18:54] M42600367 stage 2 is 0.89% complete. Time: 31.187 sec. [Work thread Apr 21 19:49] M42600367 stage 2 is 99.13% complete. Time: 31.257 sec. [Work thread Apr 21 19:50] M42600367 stage 2 complete. 2158931 transforms. Time: 3377.253 sec. [Work thread Apr 21 19:50] Stage 2 GCD complete. Time: 11.398 sec. [Work thread Apr 21 19:50] M42600367 completed P+1, B1=700000, B2=32900000, Wi8: 4C34DDA9 [Comm thread Apr 21 19:50] Sending result to server: UID: ***/GCE_3, M42600367 completed P+1, B1=700000, B2=32900000, Wi8: 4C34DDA9 [Work thread Apr 21 17:20] P+1 on M42600379 with B1=800000, B2=TBD [Work thread Apr 21 17:21] M42600379 stage 1 is 0.46% complete. Time: 34.118 sec. [Work thread Apr 21 18:59] M42600379 stage 1 is 99.95% complete. Time: 34.114 sec. [Work thread Apr 21 18:59] M42600379 stage 1 complete. 3486053 transforms. Time: 5931.664 sec. [Work thread Apr 21 18:59] Stage 1 GCD complete. Time: 10.011 sec. [Work thread Apr 21 18:59] With trial factoring done to 2^75, optimal B2 is 48*B1 = 38400000. [Work thread Apr 21 18:59] Chance of a new factor assuming no ECM has been done is 0.437% [Work thread Apr 21 18:59] D: 630, relative primes: 1683, stage 2 primes: 2278054, pair%=95.13 [Work thread Apr 21 18:59] Using 29996MB of memory. [Work thread Apr 21 18:59] Stage 2 init complete. 4963 transforms. Time: 18.917 sec. [Work thread Apr 21 19:00] M42600379 stage 2 is 0.77% complete. Time: 28.566 sec. [Work thread Apr 21 19:58] M42600379 stage 2 is 99.22% complete. Time: 28.586 sec. [Work thread Apr 21 19:59] M42600379 stage 2 complete. 2499826 transforms. Time: 3571.213 sec. [Work thread Apr 21 19:59] Stage 2 GCD complete. Time: 9.984 sec. [Work thread Apr 21 19:59] M42600379 completed P+1, B1=800000, B2=38400000, Wi8: 4C474AA4 [Comm thread Apr 21 19:59] Sending result to server: UID: xxx/GCE_4, M42600379 completed P+1, B1=800000, B2=38400000, Wi8: 4C474AA4 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Thinking of Joining GPU to 72  jschwar313  GPU to 72  3  20160131 00:50 
Thinking about lasieve5  Batalov  Factoring  6  20111227 22:40 
Thinking about buying a panda  jasong  jasong  1  20081111 09:43 
Loud thinking on irregular primes  devarajkandadai  Math  4  20070725 03:01 
Question on unfactored numbers...  WraithX  GMPECM  1  20060319 22:16 