Forum: Miscellaneous Math
2021-01-18, 12:54
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Replies: 0
Views: 90
n=x^3-x-1
Let n=x^3-x-1 for x integer >2. In the past I have tested x^n==x mod n => n is prime.
Let's start with n=p*q. Note that either p or q is congruent to -1 mod 4 and either p or q is congruent to -1...
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Forum: GPU Computing
2021-01-16, 17:13
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Replies: 16
Views: 411
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Forum: Hardware
2021-01-16, 16:52
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Replies: 13
Views: 1,512
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Forum: GPU Computing
2021-01-16, 16:39
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Replies: 16
Views: 411
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Forum: PrimeNet
2021-01-15, 11:44
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Replies: 12
Views: 398
LL first tests are double checked. However PRP...
LL first tests are double checked. However PRP tests are preferable; Not only is there Gerbicz error checking, a certificate is produced which means only one test is performed -- unless it is PRP...
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Forum: And now for something completely different
2021-01-14, 08:21
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Replies: 241
Views: 32,567
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Forum: And now for something completely different
2021-01-14, 01:21
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Replies: 2
Views: 171
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Forum: Viliam Furik
2021-01-13, 01:04
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Replies: 17
Views: 334
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Forum: Miscellaneous Math
2021-01-05, 00:31
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Replies: 9
Views: 210
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Forum: Miscellaneous Math
2021-01-04, 22:53
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Replies: 9
Views: 210
crazy Mersenne test
If there exists a non-power of 2, k, such that Mod(k,n)^p==1 then n, a Mersenne number, is composite. E.g. n p=11, k=39; n p=23, k=156171.
Is there any quick way to identify a k for a particular...
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Forum: And now for something completely different
2021-01-03, 08:23
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Replies: 36
Views: 11,005
Hmm, I have just created a second Primo folder...
Hmm, I have just created a second Primo folder and am running M-cofactor at niceness 19. I have 128 threads after all. But you seem to be right about top -- I'll monitor the situation for a week or...
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Forum: And now for something completely different
2021-01-03, 07:33
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Replies: 36
Views: 11,005
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Forum: Riesel Prime Search
2021-01-01, 23:40
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Replies: 5
Views: 242
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Forum: Lounge
2021-01-01, 00:00
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Replies: 46
Views: 3,330
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Forum: Science & Technology
2020-12-31, 18:19
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Replies: 49
Views: 1,606
The c:censored:k ups have begun. Despite the...
The c:censored:k ups have begun. Despite the tested and recommended dose interval of three weeks by the manufacturer between jabs, the uk tory government playing pseufo-scientists know better and...
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Forum: y-cruncher
2020-12-29, 01:43
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Replies: 14
Views: 1,151
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Forum: Hardware
2020-12-29, 01:03
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Replies: 284
Views: 33,854
Asus R7 defaults:
2020-12-29 00:57:04 GpuOwl...
Asus R7 defaults:
2020-12-29 00:57:04 GpuOwl VERSION v7.2-16-g1a50f11-dirty
2020-12-29 00:57:04 GpuOwl VERSION v7.2-16-g1a50f11-dirty
2020-12-29 00:57:04 Note: not found 'config.txt'
2020-12-29...
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Forum: And now for something completely different
2020-12-25, 02:11
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Replies: 36
Views: 11,005
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Forum: Science & Technology
2020-12-23, 08:39
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Replies: 49
Views: 1,606
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Forum: ONeil
2020-12-20, 19:31
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Replies: 49
Views: 1,550
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Forum: ONeil
2020-12-20, 19:00
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Replies: 49
Views: 1,550
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Forum: GPU Computing
2020-12-19, 20:20
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Replies: 27
Views: 846
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Forum: GPU Computing
2020-12-19, 13:08
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Replies: 27
Views: 846
I was talking about installing Gentoo from...
I was talking about installing Gentoo from scratch! There is now a nice tool (https://wiki.gentoo.org/wiki/Installer) that walks beginners through the engaging installation process.
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Forum: GPU Computing
2020-12-19, 11:06
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Replies: 27
Views: 846
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Forum: GpuOwl
2020-12-08, 06:11
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Replies: 19
Views: 2,667
Debian/Ubuntu/Centos/Fedora
Debian has a problem with ROCm's latest drivers -- requires and uninstallable version of python.
Ubuntu was a disaster for me. OS slowed down after a few days then ROCm upgrade screwed the system,...
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