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Search: Posts Made By: kriesel
Forum: Data 2020-12-05, 21:50
Replies: 3,356
Views: 226,198
Posted By kriesel
One to go ...

One to go
https://www.mersenne.org/report_exponent/?exp_lo=53942353&exp_hi=&full=1
Forum: Data 2020-12-05, 21:44
Replies: 3,356
Views: 226,198
Posted By kriesel
There are verified or DC PRP and LL in nearly...

There are
verified or DC PRP and LL in nearly every 1M interval up to 200M (with more being filled in as fast as I can get them done);
several more scattered verified PRP up to 320M, and scattered...
Forum: GpuOwl 2020-12-05, 19:32
Replies: 2,613
Views: 175,811
Posted By kriesel
Some interesting instrumentation here:...

Some interesting instrumentation here: https://github.com/opcm/pcm/blob/master/README.md
Forum: GpuOwl 2020-12-05, 18:24
Replies: 2,613
Views: 175,811
Posted By kriesel
My mining rig style systems say x1 to x16...

My mining rig style systems say x1 to x16 extenders are fine, for gpuowl or mfaktc etc. There may be some performance loss during gpu-host transfers, but it's offset by better cooling and higher gpu...
Forum: Lounge 2020-12-05, 17:52
Replies: 156
Views: 18,034
Posted By kriesel
You could consider getting yourself a Xeon Phi...

You could consider getting yourself a Xeon Phi 7250 which can test 4 such guesses simultaneously, completing in 11 days, for a throughput of about 2.5 per week. ~$700....
Forum: Hardware 2020-12-05, 16:44
Replies: 149
Views: 7,552
Posted By kriesel
Highest indicated clock rate I've seen from the...

Highest indicated clock rate I've seen from the Xeon Phi 7250 is 1.55 Ghz (Windows Task Manager, a small fraction of the cores in use). Square waves have odd harmonics of the fundamental frequency...
Forum: PrimeNet 2020-12-04, 17:45
Replies: 7
Views: 147
Posted By kriesel
The interim residues logged in prime.log as...

The interim residues logged in prime.log as uploaded at 500K iterations from start and every multiple of 5M from there on are IIRC only least-significant-64-bits. These get logged in results.txt:...
Forum: PrimeNet 2020-12-04, 17:29
Replies: 1
Views: 140
Posted By kriesel
The poll close date 2021-06-22 is several months...

The poll close date 2021-06-22 is several months after what apparently is the proposed 2021-01-01 change in server reservation policy. That's a little late to inform decisions for action just weeks...
Forum: Information & Answers 2020-12-04, 16:32
Replies: 9
Views: 182
Posted By kriesel
Either finding a new very large prime, or...

Either finding a new very large prime, or determining whether the Mersenne number has multiple more factors not yet found. Some people like to fully factor them.
Mprime/prime95 can DC or verify a...
Forum: Science & Technology 2020-12-04, 08:57
Replies: 54
Views: 1,190
Posted By kriesel
Probably pretty good instincts. During WWII...

Probably pretty good instincts.

During WWII there was a debate over the cost and effectiveness of British bombing of Germany. Precision was notably lacking, so it was done fairly indiscriminately....
Forum: Lounge 2020-12-04, 08:31
Replies: 13
Views: 312
Posted By kriesel
"M DISC media has a projected lifetime of several...

"M DISC media has a projected lifetime of several hundred years." (Marketing department)
"10-Year Limited Warranty" (Legal department and accounting)

I recall a debate over a large proposal...
Forum: Science & Technology 2020-12-03, 21:31
Replies: 54
Views: 1,190
Posted By kriesel
Oh well. It was too small and old anyway. Next...

Oh well. It was too small and old anyway. Next task is to convince the powers that be that a replacement is vital to defending the US from China / Covid19 / terrorism / space rocks.
As an engineer,...
Forum: Lounge 2020-12-03, 21:09
Replies: 13
Views: 312
Posted By kriesel
Shades of SYM-1....

Shades of SYM-1. http://www.oldcomputers.net/sym-1.html I still have it, and the box it shipped in. Expansion to a whopping 4K, and a video interface. The Radio Shack cassette unit crapped out in...
Forum: Science & Technology 2020-12-03, 18:56
Replies: 2,838
Views: 175,987
Posted By kriesel
A blast from the past (or ~7000 of them). This...

A blast from the past (or ~7000 of them). This was overshadowed by events a couple months earlier. http://hyperphysics.phy-astr.gsu.edu/hbase/Particles/kamio.html
Forum: Lounge 2020-12-03, 18:35
Replies: 13
Views: 312
Posted By kriesel
What's the most you ever paid for a floppy or a floppy drive?

1982, Computerland, box of 10 IBM label floppies $60.
I think the oneIBM label 5.25" 320K full height floppy drive in the original IBM PC listed at $570.
Now we can get whole systems for less.
I...
Forum: Data 2020-12-03, 18:27
Replies: 3,356
Views: 226,198
Posted By kriesel
Interesting, thanks. There are more PRP+CERT...

Interesting, thanks. There are more PRP+CERT above 114M.
Forum: Data 2020-12-03, 15:39
Replies: 3,356
Views: 226,198
Posted By kriesel
One left to 100M

https://www.mersenne.org/assignments/?exp_lo=99128257&exp_hi=100000000&execm=1&exp1=1&extf=1&exdchk=1
No progress in days, 25 days to expire, then someone with a fast cpu or gpu can crush it.
Forum: GpuOwl 2020-12-03, 15:17
Replies: 68
Views: 4,194
Posted By kriesel
inexplicably long V7.2-21 iteration timings on continuation of 1257787 prp test from v7.0-40

V7.0-40 used to start the run gives ~200us/it timings.
C:\msys64\home\ken\gpuowl-compile\gpuowl-v7.0-40-gb62d4fd>gpuowl-win -prp 1257787 -iters 10000 -use NO_ASM
2020-12-03 04:36:04 gpuowl...
Forum: Lounge 2020-12-03, 12:41
Replies: 156
Views: 18,034
Posted By kriesel
These were originally done on gpuowl v7.1-1 and...

These were originally done on gpuowl v7.1-1 and v7.1-11 on a system with nonECC ram.
"Please upgrade to v7.2 which fixes a proof generation bug."...
Forum: Lounge 2020-12-03, 12:01
Replies: 13
Views: 312
Posted By kriesel
Generally, when we notice data storage medium...

Generally, when we notice data storage medium life is when it is not long enough. But it's way longer than floppies were originally designed for.
The first floppies were intended for microcode...
Forum: Lounge 2020-12-03, 11:11
Replies: 13
Views: 371
Posted By kriesel
So, a piece of 2x2 of keyboard length, with...

So, a piece of 2x2 of keyboard length, with another nailed alongside with an offset vertically to correspond to the vertical offset of black keys above white. Same chord, repeated, like the first few...
Forum: GpuOwl 2020-12-03, 10:22
Replies: 68
Views: 4,194
Posted By kriesel
P-1 on same gpu as continuing from v7.1-11 saved file with v7.2-21 gave load errors

Testing continuation of v7.1-11 written PRP file with V7.2-21 gave a burst of errors. This was on Windows 7 x64 Pro, RX480, while a V6.11-380 P-1 was running on the same...
Forum: Hardware 2020-12-02, 20:40
Replies: 149
Views: 7,552
Posted By kriesel
I did not mess with the BIOS in regard to cpu...

I did not mess with the BIOS in regard to cpu speed limits, that I recall. Windows 10 Task Manager has shown it at as I recall at least 1.42, 1.44, and 1.5Ghz; the first two under heavy prime95 load...
Forum: Hardware 2020-12-02, 20:09
Replies: 149
Views: 7,552
Posted By kriesel
I concur after a light reading of it. Somehow the...

I concur after a light reading of it. Somehow the BIOS, Windows 10 and prime95 knew what to do with the MCDRAM in the absence of any DIMMS in my system, and use it as addressable memory. Sounds like...
Forum: Lounge 2020-12-02, 19:49
Replies: 13
Views: 371
Posted By kriesel
You're going to run out of fingers, even in a...

You're going to run out of fingers, even in a duet with an identical twin with bilateral polydactyly.

Rough draft from faded memories of the basics from school days music class long ago
88 keys...
Showing results 1 to 25 of 1000

 
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