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Search: Posts Made By: kriesel
Forum: chalsall 2021-09-26, 22:58
Replies: 16
Views: 360
Posted By kriesel
Maybe it's where culled ex-MS Windows OS...

Maybe it's where culled ex-MS Windows OS programmers go to attempt revenge. Or it's what they're doing in some free time, and habits carry over from the office.
Forum: Math 2021-09-26, 22:17
Replies: 13
Views: 384
Posted By kriesel
Round these parts, people want to see code,...

Round these parts, people want to see code, number theoretic basis, efficiency, and accurate results.
193, a 4:1 discrepancy.

y=a x + c = 194; a=64, x=3, c=2
M=(194 + 64 * 3) / 2 = 193

or M =...
Forum: Marin's Mersenne-aries 2021-09-26, 20:56
Replies: 74
Views: 5,122
Posted By kriesel
7

57797893 completed.
Forum: chalsall 2021-09-26, 17:39
Replies: 16
Views: 360
Posted By kriesel
And presumably each additional Ubuntu based VM,...

And presumably each additional Ubuntu based VM, which may be kept around for testing in differing environments or whatever. How MS-ish of them.
Forum: Marin's Mersenne-aries 2021-09-26, 14:40
Replies: 74
Views: 5,122
Posted By kriesel
8

That changed quickly. Lingering cert cleared, and 2 LL DC. MP#48* loses the * projected ~2021-10-01 by alternate method.
Extrapolating a linear fit through the various projections from M56 history...
Forum: Cloud Computing 2021-09-26, 13:40
Replies: 1,173
Views: 126,034
Posted By kriesel
Number of accounts limit

Assuming 1 gmail email address per account and instance of Colab free, a recent online search indicated Google does not limit number of email addresses per person. So the practical limits on Colab...
Forum: kriesel 2021-09-26, 12:55
Replies: 23
Views: 8,204
Posted By kriesel
Why don't we preallocate PRP proof disk space in parallel with the computation?

(Some of this was originally posted as parts of https://mersenneforum.org/showpost.php?p=588497&postcount=441 andhttps://mersenneforum.org/showpost.php?p=588500&postcount=443)

In recent versions...
Forum: Marin's Mersenne-aries 2021-09-26, 11:11
Replies: 74
Views: 5,122
Posted By kriesel
11

10 DC and 1 lingering CERT remain; 57760673 completed.
Forum: Cloud Computing 2021-09-26, 10:38
Replies: 1,173
Views: 126,034
Posted By kriesel
Colab free, only attempting single instance per...

Colab free, only attempting single instance per account, if/when I get a GPU it's always a K80 for weeks now.
Forum: Math 2021-09-25, 22:40
Replies: 13
Views: 384
Posted By kriesel
PRP is fast in large part because we only need to...

PRP is fast in large part because we only need to do it once per exponent. The VDF based proof generation allows verification of correct completion for additional effort that's a fraction of a...
Forum: GpuOwl 2021-09-25, 20:38
Replies: 5
Views: 120
Posted By kriesel
Good. One thing in favor of V7.x P-1 is...

Good.
One thing in favor of V7.x P-1 is superior error detection.
1) It saves powers of 3 produced during PRP/GEC, for use in generating the P-1 stage 1 power of 3. Generation of those individual...
Forum: Lounge 2021-09-25, 18:46
Replies: 22
Views: 552
Posted By kriesel
Thx. That firm's in Texas. Regs vary by state. I...

Thx. That firm's in Texas. Regs vary by state. I have a little array on my deck, but it's an isolated 12Vdc system. Does an ok job of providing a bit of direct DC lighting, spare battery charging, or...
Forum: Math 2021-09-25, 18:32
Replies: 13
Views: 384
Posted By kriesel
(FTFY) PRP+proof ~1.01 test effort and high...

(FTFY)
PRP+proof ~1.01 test effort and high certainty of correctness.
LL & LL DC & ~4% LL TC ~2.04 test effort at wavefront. 2.04/1.01 >2. And PRP/GEC/proof gets more advantageous at higher...
Forum: GpuOwl 2021-09-25, 18:13
Replies: 5
Views: 120
Posted By kriesel
Right. In V7.x you'd have to give bounds with a...

Right. In V7.x you'd have to give bounds with a PRP worktodo line, then kill the run after P-1 stage 2 finishes. (Possibly you could use -iters if that worked. I vaguely recall trying that -iters...
Forum: Lounge 2021-09-25, 17:51
Replies: 22
Views: 552
Posted By kriesel
I recently looked at what would be involved in...

I recently looked at what would be involved in getting a rooftop solar array approved and installed. The regs (https://docs.legis.wisconsin.gov/code/admin_code/psc/119.pdf) here require approval of...
Forum: Lounge 2021-09-25, 17:06
Replies: 22
Views: 552
Posted By kriesel
Who's selling such hardware? I've never seen that.

Who's selling such hardware? I've never seen that.
Forum: GpuOwl 2021-09-25, 16:53
Replies: 5
Views: 120
Posted By kriesel
Yes. V6.11-380 or somewhat earlier. If you don't...

Yes. V6.11-380 or somewhat earlier. If you don't specify bounds somehow, it will default to B1=1M, B2=30M. Worktodo entry formats here...
Forum: Marin's Mersenne-aries 2021-09-25, 14:02
Replies: 74
Views: 5,122
Posted By kriesel
12

12 (11 DC 1 cert) remain; 57760333 completed; smallest remaining delta 582, average 12905.
Forum: Marin's Mersenne-aries 2021-09-25, 12:38
Replies: 74
Views: 5,122
Posted By kriesel
13

12 DC to finish, and a cert. Certs typically complete within a day. One DC is a bit overdue for expiration and reassignment. The other 11 DC are all recently reassigned to Cat0-qualified fast...
Forum: Marin's Mersenne-aries 2021-09-24, 22:54
Replies: 74
Views: 5,122
Posted By kriesel
14

57747401 done, lowest remaining unchanged. A fine example of how lowest remaining does not always reflect progress well, sometimes not at all. Smallest remaining delta just jumped from 32 to 340.
Forum: Science & Technology 2021-09-24, 22:42
Replies: 252
Views: 20,195
Posted By kriesel
Hoping for a good outcome, Chris. I recently...

Hoping for a good outcome, Chris.

I recently heard from someone who I've not seen in person for over a year, that despite his wife's expressed concerns, he and the rest of the band got together to...
Forum: Marin's Mersenne-aries 2021-09-24, 17:58
Replies: 74
Views: 5,122
Posted By kriesel
15 left

and M57747401 likely to complete within a day.
Get ready to celebrate.
Forum: Marin's Mersenne-aries 2021-09-24, 14:29
Replies: 74
Views: 5,122
Posted By kriesel
Correct. Jacobi symbol ...

Correct. Jacobi symbol (https://en.wikipedia.org/wiki/Jacobi_symbol)check is done infrequently, only ~twice a day because it is computationally costly. Its detection rate is only ~50% of errors. If...
Forum: Lounge 2021-09-24, 10:47
Replies: 22
Views: 552
Posted By kriesel
US by-state incremental US$/KWHR figures vary...

US by-state incremental US$/KWHR figures vary widely, from under $0.10 Idaho to over $0.327 Hawaii.
Change over a year from -5% Idaho to +20% Louisiana.
0.25GBP/kwhr x1.37 = US$0.3425/kwhr,...
Forum: Marin's Mersenne-aries 2021-09-24, 02:03
Replies: 74
Views: 5,122
Posted By kriesel
required reading...

required reading (https://www.mersenneforum.org/showpost.php?p=533167&postcount=5)
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