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2020-07-18, 21:42
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#1409 | |
Jul 2003
wear a mask
2·7·109 Posts |
Quote:
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2020-08-25, 14:44
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#1410 |
Sep 2011
Germany
3·19·47 Posts |
R31 tested to n=3M (1-3M)
1 prime found, 1 remain Results emailed - Base released |
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2020-09-19, 22:05
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#1411 |
"Nuri, the dragon :P"
Jul 2016
Good old Germany
14238 Posts |
I know Gary doenst like taking single k´s from larger Bases, but i do have an question about two k´s from S25.
101958*25^n+1 and 207544*25^n+1 have both an very low number of tests; each around 4,5k tests between n=350-1M; with an higher sieve limit even a few hundret less. I could get those down within a few months / weeks. But of course my aim is not to bring them up to 1M, only prime counts. If you agree i would take both til i have a prime. 
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2020-09-20, 08:55
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#1412 | |
May 2007
Kansas; USA
1028310 Posts |
Quote:
You say you will search them until you find a prime. What makes you think you would find a prime on them before you get bored with them? It is very likely that would happen. The chances of you finding a prime on them for n=350K-1M are very remote because of how low-weight they are. I'll tell you what. Run a single test at n=770K (~65% of the n-range). See how long it takes. Multiply that by the number of tests that you have to get the total CPU time. Then divide that by your number of cores that you will be running on it 24 hours a day 7 days a week. Then report that time back here. If you can honestly say that you will run all the cores that you reported here in the above calculation full time and you can provide a status report once a month I will reserve them for you. The biggest problem that CRUS has is people reserving way more work than they realize. We've also had people reserve things "until they find a prime" not realizing how remote that chance is and how long the tests begin to take in rapid fashion. |
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2020-09-25, 21:11
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#1413 | |
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"Nuri, the dragon :P"
Jul 2016
Good old Germany
78710 Posts |
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I will perform those tests over the weekend and report the results on monday. |
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2020-09-29, 17:41
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#1414 | |
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"Nuri, the dragon :P"
Jul 2016
Good old Germany
78710 Posts |
Quote:
A run at n=590K takes around 1050 secs. A run at around 780K takes around 3500 secs. That makes around 7,7 months for one of those sequences; if using two servers. However without a deeper sieve file i wont start working on them. A sieve up to P = 1e15 should erase around 500 or 600 canidates. It is still a lot of work regardless, but i think i can handle it. ^^ |
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2020-10-04, 17:38
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#1415 |
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Jul 2003
wear a mask
2×7×109 Posts |
R6 Update
R6 tested to n = 5.4e6. Residues attached. Testing continues.
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2020-10-24, 09:18
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#1416 |
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Sep 2011
Germany
3·19·47 Posts |
Reserving S30 to n=1M (800k-1M) for BOINC
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2020-11-08, 20:27
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#1417 |
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Sep 2011
Germany
A7716 Posts |
Reserving R25 to n=300k (150-300k) for BOINC --> all available k by sievefile
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2020-11-22, 19:00
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#1418 |
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Sep 2011
Germany
3×19×47 Posts |
R25 tested to n=300k (150-300k)
9 primes found, 108 remain Results emailed - Base released |
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2020-11-24, 19:45
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#1419 |
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Sep 2011
Germany
1010011101112 Posts |
S30 tested to n=1M (800k-1M)
nothing found, 2 remain Results emailed - Base released |
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