Forum: Riesel Prime Search
2021-01-22, 02:17
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Replies: 230
Views: 34,741
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Congrats to Rudi Tapper and PrimeGrid for the prime 3* 2^16819291 - 1 (https://primes.utm.edu/primes/page.php?id=131595) with 5,063,112 decimal digits and top5000 entrance rank of 21.
:banana:
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Forum: Hardware
2021-01-20, 18:06
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Replies: 16
Views: 650
"Calculate large numbers" could mean several...
"Calculate large numbers" could mean several things. What do you mean? In what time scale? If it is to do with large primes then you have several options in ascending magnitude: Pari/GP, Perl or GMP...
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Forum: Miscellaneous Math
2021-01-18, 12:54
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Replies: 1
Views: 177
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: 21
Views: 585
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Forum: Hardware
2021-01-16, 16:52
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Replies: 13
Views: 1,605
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Forum: GPU Computing
2021-01-16, 16:39
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Replies: 21
Views: 585
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Forum: PrimeNet
2021-01-15, 11:44
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Replies: 12
Views: 423
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: 33,117
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Forum: And now for something completely different
2021-01-14, 01:21
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Replies: 2
Views: 209
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Forum: Viliam Furik
2021-01-13, 01:04
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Replies: 17
Views: 356
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Forum: Miscellaneous Math
2021-01-05, 00:31
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Replies: 9
Views: 224
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Forum: Miscellaneous Math
2021-01-04, 22:53
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Replies: 9
Views: 224
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: 11,459
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: 11,459
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Forum: Riesel Prime Search
2021-01-01, 23:40
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Replies: 5
Views: 272
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Forum: Lounge
2021-01-01, 00:00
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Replies: 46
Views: 3,438
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Forum: Science & Technology
2020-12-31, 18:19
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Replies: 49
Views: 1,713
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: 1,205
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Forum: Hardware
2020-12-29, 01:03
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Replies: 284
Views: 34,200
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: 11,459
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Forum: Science & Technology
2020-12-23, 08:39
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Replies: 49
Views: 1,713
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Forum: ONeil
2020-12-20, 19:31
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Replies: 49
Views: 1,591
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Forum: ONeil
2020-12-20, 19:00
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Replies: 49
Views: 1,591
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Forum: GPU Computing
2020-12-19, 20:20
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Replies: 27
Views: 892
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Forum: GPU Computing
2020-12-19, 13:08
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Replies: 27
Views: 892
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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