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Search: Posts Made By: kriesel
Forum: Lounge 2021-11-26, 12:55
Replies: 1,512
Views: 159,939
Posted By kriesel
New variant concerning, leading to a new round of...

New variant concerning, leading to a new round of travel bans
https://science.thewire.in/health/b-1-1-529-britain-says-new-sars-cov-2-variant-is-most-significant-yet-found/
Forum: Hardware 2021-11-25, 03:25
Replies: 28
Views: 2,411
Posted By kriesel
Why LL with its inferior error checking and full...

Why LL with its inferior error checking and full 100%+ cost DC, not PRP with GEC and proof generation and ~0.5% certification cost?
Forum: Mlucas 2021-11-24, 23:05
Replies: 10
Views: 619
Posted By kriesel
No. Mersenne & Fermat numbers; P-1 LL PRP, & P-1...

No. Mersenne & Fermat numbers; P-1 LL PRP, & P-1 Pepin test respectively.
https://www.mersenneforum.org/showpost.php?p=488291&postcount=2...
Forum: Astronomy 2021-11-24, 19:24
Replies: 29
Views: 2,431
Posted By kriesel
https://www.youtube.com/watch?v=7IjgZGhHrYY A...

https://www.youtube.com/watch?v=7IjgZGhHrYY
A payload (http://www.sal.wisc.edu/WUPPE/) the UW-Madison produced missed the Challenger disaster...
Forum: GPU Computing 2021-11-24, 19:16
Replies: 6
Views: 139
Posted By kriesel
See also this post...

See also this post (https://www.mersenneforum.org/showpost.php?p=488292&postcount=3) in the reference info compilation (https://mersenneforum.org/showthread.php?t=24607).
Forum: GPU Computing 2021-11-23, 19:10
Replies: 3,519
Views: 449,927
Posted By kriesel
Try an explicitly CUDA10.x build of mfaktc. It's...

Try an explicitly CUDA10.x build of mfaktc. It's possible the CUDA11.2 mfaktc build (CC 8.6) did not include the optional downlevel compute capability levels such as CC 7.5. See...
Forum: Hardware 2021-11-23, 14:11
Replies: 8
Views: 256
Posted By kriesel
Ebay...

Ebay (https://www.ebay.com/sch/i.html?_from=R40&_nkw=xeon+phi&_sacat=175673&_sop=15) currently has some 5110P coprocessors for under $100; in one case = $40 US. For experimentation on a budget.
Forum: Hardware 2021-11-23, 01:53
Replies: 8
Views: 256
Posted By kriesel
per https://en.wikipedia.org/wiki/Xeon_Phi...

per https://en.wikipedia.org/wiki/Xeon_Phi content: (https://en.wikipedia.org/wiki/Xeon_Phi:)
Knights Corner ram is GDDR5 ECC (no provision for DIMM, or any other expansion) as PCIe coprocessor...
Forum: Hardware 2021-11-22, 21:10
Replies: 8
Views: 256
Posted By kriesel
I have a 7120A, which is PCIe coprocessor not...

I have a 7120A, which is PCIe coprocessor not installed ATM. Estimated 1/3 throughput of a 7210. Limited and fixed max ram would cost P-1 performance at normal exponents, preclude past ~1G....
Forum: chalsall 2021-11-22, 19:44
Replies: 26
Views: 399
Posted By kriesel
Compare the damage at 75MPH in the recent...

Compare the damage at 75MPH in the recent instance and damage at 55MPH! in the previous storm, to the design requirements easily found by web search in...
Forum: GPU Computing 2021-11-22, 18:20
Replies: 3,519
Views: 449,927
Posted By kriesel
Run mfaktc with the -info option. Output should...

Run mfaktc with the -info option. Output should look something like the following, which works. Check the bolded part below. (Underlined stuff can vary.) Mismatch between runtime version (dll) and...
Forum: GPU Computing 2021-11-22, 18:02
Replies: 3,519
Views: 449,927
Posted By kriesel
Win10 pro should not be an issue. Some older OS...

Win10 pro should not be an issue. Some older OS versions (Vista, XP) can be due to limits on driver availability for newer GPUs. Or occasionally an old CPU is not compatible with a new driver, or any...
Forum: chalsall 2021-11-22, 16:19
Replies: 26
Views: 399
Posted By kriesel
Wind and solar generation are inherently big...

Wind and solar generation are inherently big exposed installations vulnerable to damage by flying objects (trees, cows, vehicles, fragments of destroyed buildings, etc.) and becoming flying debris...
Forum: mersenne.ca 2021-11-22, 15:13
Replies: 719
Sticky: mersenne.ca
Views: 96,453
Posted By kriesel
I believe it must change the factor finding...

I believe it must change the factor finding probability to change the exponent. f=2kp+1. For larger p, fewer potential factors fit in the bounds. That's the broader trend. For small delta p,...
Forum: Software 2021-11-22, 13:14
Replies: 138
Sticky: Prime95 30.7
Views: 11,169
Posted By kriesel
What bounds b1, b2 did it select or you specify?...

What bounds b1, b2 did it select or you specify? How much ram did you allow it? P-1 or something else?
Forum: Math 2021-11-21, 15:46
Replies: 4
Views: 241
Posted By kriesel
This paper states the Pepin test for Fermats, and...

This paper states the Pepin test for Fermats, and the Lucas-Lehmer for Mersennes, provide certificates....
Forum: Math 2021-11-21, 12:03
Replies: 4
Views: 241
Posted By kriesel
Depends on what you mean. I have a stash of PRP...

Depends on what you mean. I have a stash of PRP proof result files for assorted known Mersenne primes. These could conceivably be run through the server processing and cert issue. Since the known...
Forum: Lounge 2021-11-20, 14:31
Replies: 4,400
Views: 375,729
Posted By kriesel
A slice of multigrain bread works for me. More...

A slice of multigrain bread works for me. More digestible than the gummy pasty-white buns, too. Less frequent structural failure at the hinge is a bonus. Plus better cost.
Forum: Lounge 2021-11-20, 12:21
Replies: 4,400
Views: 375,729
Posted By kriesel
10 vs 8? Because sometimes a dog goes without a...

10 vs 8? Because sometimes a dog goes without a bun. A niece refused to eat anything else for months when young. (Now a vegetarian, go figure.)
Forum: Software 2021-11-19, 21:19
Replies: 22
Views: 601
Posted By kriesel
214=16384, which is a rather small bound for most...

214=16384, which is a rather small bound for most exponents. Perhaps you meant 1014?
Forum: Software 2021-11-19, 20:52
Replies: 22
Views: 601
Posted By kriesel
Thanks for doing your homework first. (Not...

Thanks for doing your homework first. (Not everyone does.) I've updated that page considerably since your post. I knew of no way to move P-1 work in progress among applications without giving up all...
Forum: Forum Feedback 2021-11-19, 11:32
Replies: 3
Sticky: Documentation
Views: 3,683
Posted By kriesel
Looks to me like "ignore thread" is not among the...

Looks to me like "ignore thread" is not among the possibilities. For those occasions when "ignore user" is just not enough, because he's successful at trolling other users, on a topic that's of no...
Forum: Software 2021-11-18, 20:45
Replies: 22
Views: 601
Posted By kriesel
Or read the source code, perhaps while a guess...

Or read the source code, perhaps while a guess runs.
Forum: kriesel 2021-11-18, 19:22
Replies: 20
Views: 5,805
Posted By kriesel
File size scaling

Size of the largest files depends on exponent and computation type. Number depends on the computation type. File size is independent of P-1 bounds, determined by mod Mp. LL will have p and q files....
Forum: kriesel 2021-11-17, 12:37
Replies: 20
Views: 5,805
Posted By kriesel
Optimizing core count for fastest iteration time of a single task

On a dual-processor-package system, 2 x E5-2697V2 (each of which are 12-core plus x2 hyperthreading, for a total of 2 x 12 x 2 =48 logical processors), within Ubuntu running atop WSL1 on Win 10 Pro...
Showing results 1 to 25 of 1000

 
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