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2021-09-01, 11:11   #419
pepi37

Dec 2011
After milion nines:)

1,487 Posts

Quote:
 Originally Posted by Prime95 What's wrong with ProofPower=0?

Thank you! Works perfect!

 2021-09-02, 19:55 #420 SethTro     "Seth" Apr 2019 2×5×41 Posts I missed a comma in a PMinus1 assignment which resulted in only stage one happening (which it completed). When I added the exponent back with PMinus1=1,2,21317,-1,30000000000,0,67,2 Code: [Worker #5 Sep 1 23:29] P-1 on M21317 with B1=30000000000, B2=TBD [Worker #5 Sep 1 23:29] Using AVX FFT length 1K [Worker #5 Sep 1 23:29] M21317 stage 1 complete. 0 transforms. Time: 0.887 sec. [Worker #5 Sep 1 23:29] Stage 1 GCD complete. Time: 0.001 sec. [Worker #5 Sep 1 23:29] Available memory is 31000MB. (6 hours to make up it's mind) [Worker #5 Sep 2 05:36] With trial factoring done to 2^67, optimal B2 is 614891451*B1 = 18446743530000000000. [Worker #5 Sep 2 05:36] If no prior P-1, chance of a new factor is 41.6% I've seen 200*B1 and 1000*B1 with ecm but never 614,000,000*B1 Also weird that it took 6 hours to make up it's mind.
2021-09-03, 01:18   #421
Prime95
P90 years forever!

Aug 2002
Yeehaw, FL

23×971 Posts

Quote:
 Originally Posted by SethTro PMinus1=1,2,21317,-1,30000000000,0,67,2 I've seen 200*B1 and 1000*B1 with ecm but never 614,000,000*B1 Also weird that it took 6 hours to make up it's mind.
The 6 hours bug is fixed in 30.7. I've also capped the max B2/B1 at 1000 (can override with a prime.txt setting).

It may well be that large B2/B1 ratio makes sense. Prime95 looks at the incremental cost associated with increasing the B2/B1 ratio and asks "if I invested that cost in increasing B1, which would have the better chance of finding a factor"?

With your ultra large B1 I suppose there is little to be gained in raising B1, thus prime95 concludes a very large B2/B1 ratio makes sense. Your version finally stopped at a ratio of 614000000 because B2*B1 overflowed 64 bits.

2021-09-03, 03:19   #422
Prime95
P90 years forever!

Aug 2002
Yeehaw, FL

23×971 Posts

Quote:
 Originally Posted by SethTro PMinus1=1,2,21317,-1,30000000000,0,67,2
30.7 is going to have real trouble running stage 2 on this. Maybe if you keep the B2/B1 ratio low it will work.

30.7 uses a new prime pairing algorithm that is mainly targeting the common cases: B1 from 50,000 to 100,000,000 and B2/B1 from 10 to 200.

 2021-09-03, 04:28 #423 axn     Jun 2003 34×5×13 Posts 21317 has ECM done till half t45. If you convert that to a TF depth and use that instead of 67, maybe it will generate reasonable B2? EDIT:- Or realize that asking P95 to generate "optimal" B2 with completely made up numbers like "67,2" is piling nonsense upon nonsense, and instead just specify the B2 manually (say B1*200). EDIT2:- But naturally, this small an exponent should use GMP-ECM to do stage 2. Last fiddled with by axn on 2021-09-03 at 04:39
 2021-09-03, 06:38 #424 pepi37     Dec 2011 After milion nines:) 101110011112 Posts To rise old question from the dust, can in Prime95 be implemented option STOP K when prime is found ( same as LLR have) It will be great for CRUS search.
2021-09-03, 19:30   #426
Prime95
P90 years forever!

Aug 2002
Yeehaw, FL

23×971 Posts

Quote:
 Originally Posted by SethTro I think changing worker threads reset my progress on ECM. I do have e0125429 and e0125429_1 so it's likely some status has been saved but it's hard to inspect these files by hand to see which curve it thinks it's on.
ECM save file names are a mess. The _1 is there so that multiple workers can all ECM the same number.

Step 1: backup the two files.
Step 2: delete and/or rename files until prime95 uses the one with 640+ curves.

Sorry for the trouble.

 2021-09-03, 21:26 #427 SethTro     "Seth" Apr 2019 2×5×41 Posts That worked. Thanks for the advice and thanks for writing all of the code :)
 2021-09-11, 00:29 #428 Glenn   "Glenn Leider" Apr 2021 Carlsbad, CA 2×11 Posts Latest Prime95 Updating? At what point should I update my Prime95 software? I'm currently using 30.6 Build 4, which seems to be the latest easily available, though I'm now reading about 30.7 in this thread.
 2021-09-11, 00:47 #429 James Heinrich     "James Heinrich" May 2004 ex-Northern Ontario 22×29×31 Posts Perhaps the better question is why the download page still points to v30.3b6?

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