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Old 2014-09-05, 00:42   #144
Citrix
 
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Serge,

I understand your point, but one of the reasons I like prime testing/distributed computing is to be as efficient I can. I like and value efficiency.

Why don't you go ahead with the range. I have stumbled across something very interesting that I am currently working on and won't have the CPU resources to work on GM search for the next few months to a whole year. I will join back once I have some free resources. I can pick up a smaller range in the 5M+ region, when I have some free computing resources.
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Old 2014-09-05, 01:00   #145
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Ok. I will start by GPU sieving de novo (I want to give gmqfaktc a good test).
We can compare the survivor candidates, later. We can compare some residues later, too. I will run the AVX binary on the survivors.

After that I will finish the 4.7-5M GQ-only PRP tests as well. Those are enormous. (Caldwell's double check with PFGW took 6.7 days, as far as I remember. but of course that was before they got a new, shiny, fast server for UTM.)

For this particular project, I was on a hiatus since April, too.
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Old 2014-09-06, 16:34   #146
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23704053 + 21852027 + 1 is prime

There is ~5 AVX CPU-years of work in this interval (or ~8 non-AVX years), and this was waiting in the middle of it.

Last fiddled with by Batalov on 2014-09-06 at 17:01 Reason: formatting
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Old 2014-09-06, 22:05   #147
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Congratulations.
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Old 2014-09-06, 22:38   #148
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Thanks! ;-)

Granted, the expected number of GM+GQs was << 1 in this interval.

You mentioned that you had ~8 cores? With them, you could have reached this number, from end of Feb to mid- or end of summer. But aw well.
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Old 2014-09-07, 02:22   #149
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I did not do the work sequentially. I had done part of that range. Just a matter of luck.
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Old 2014-09-07, 08:44   #150
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Congratulations
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Old 2014-09-08, 01:16   #151
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Default 3.5-3.85M range is complete

The 3.5-3.85M range is complete. The report is attached. 1 GM was found.

The J.Penne file <<gmfcandidates.txt>> had 1537 candidates removed out of 23172 prime numbers in this interval. For QC, these were double-checked and the tiny factors are included in an addendum(<<RES_GMQ_35_to32bit.txt>>). Each of the 23172 prime numbers in this interval is accounted for, on both GM and GQ sides. Pre-factoring was done using gmqfaktc-0.20 to 60 bits. All factors are validated with Pari/GP.

Light doublecheck for randomly chosen candidates (n=40) produced full agreement in the 80 RES64s with the initial run (of note: LLR implements random bit-shifts for tests of GM candidates, so these were independent just like within GIMPS). More double-checks are, of course, welcome.
Attached Files
File Type: zip Report350-385.zip (936.1 KB, 85 views)
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Old 2015-01-01, 00:29   #152
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Lightbulb

I'll have a look at adapting the Cyclo program for Gaussian- (and Eisenstein-)Mersennes.
Then we may have a great boost to find the next sequence members on GPUs.
And we already have a GPU sieve.
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Old 2015-01-02, 10:52   #153
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Quote:
Originally Posted by Batalov View Post
I'll have a look at adapting the Cyclo program for Gaussian- (and Eisenstein-)Mersennes.
Then we may have a great boost to find the next sequence members on GPUs.
And we already have a GPU sieve.
By GPU you mean nVidia or is there a software for AMD too?
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Old 2015-01-02, 16:17   #154
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Well, I have modified mfaktc, but I have never looked at mfakto.
I don't know how different they are.
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