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Search: Posts Made By: ewmayer
Forum: Software 2022-08-31, 23:32
Replies: 35
Views: 17,506
Posted By ewmayer
@ramgeis: Thanks for the bug report - oo loop...

@ramgeis:
Thanks for the bug report - oo loop bug confirmed. Here is the repeated print as it appears in the current v21 dev-code branch, where I am planning to release an updated factor.c source...
Forum: Software 2022-08-24, 21:09
Replies: 5
Views: 413
Posted By ewmayer
I can't help you with Windows-specific stuff, but...

I can't help you with Windows-specific stuff, but just looking at one of my Intel/Linux boxes where I compile and run GMP-using C code:

ls -l /usr/include/gmp*
-rw-r--r-- 1 root root 116607 Dec ...
Forum: Lounge 2022-08-21, 19:42
Replies: 1,988
RIP
Views: 245,194
Posted By ewmayer
Given that most people have limited shelf space,...

Given that most people have limited shelf space, if it's not, say, one of the classics or something you will read over and over, enjoy it, then put it on the "Leave one, take one" shelf at your...
Forum: Soap Box 2022-08-18, 01:01
Replies: 30
Views: 879
Posted By ewmayer
The co-discoverers of insulin assigned the patent...

The co-discoverers of insulin assigned the patent to the U. of Toronto for a token $1 (https://en.wikipedia.org/wiki/Insulin), with this rationale:

"The patent would not be used for any other...
Forum: Software 2022-08-14, 19:59
Replies: 35
Views: 17,506
Posted By ewmayer
Thanks, James- Bug confirmed. Mactor builds are...

Thanks, James- Bug confirmed. Mactor builds are officially unsupported, but I do try to fix any obvious bugs found by users.

This one is a stray info-print in a special bit of...
Forum: Tales From the Crypt(o) 2022-07-26, 21:16
Replies: 302
Views: 119,438
Posted By ewmayer
https://www.nakedcapitalism.com/2022/07/unbeknown-...

https://www.nakedcapitalism.com/2022/07/unbeknown-to-most-americans-washington-is-offering-to-share-its-largest-biometric-database-with-other-governments.html
Forum: Mlucas 2022-07-12, 22:57
Replies: 30
Views: 4,980
Posted By ewmayer
Small patch which fixes an infrequent (but...

Small patch which fixes an infrequent (but run-killing when it occurs) issue with multithreaded runs of p-1 stage 2.

As always, post #1 in this thread has updated MD5 value for the release...
Forum: Computer Science & Computational Number Theory 2022-07-01, 22:35
Replies: 83
Views: 38,412
Posted By ewmayer
F30 primality test and matching double-check

[See posts #65, #70, #74 and #75 in this thread for previous notes re. the F30 Pépin tests.]

At looooooooooooong last my multiple-systems-hopping on-again/off-again DC run of the Pépin test on F30...
Forum: Lounge 2022-06-26, 19:35
Replies: 1,241
Views: 147,791
Posted By ewmayer
Spotted on the web: A priest, a rabbit, and...

Spotted on the web:

A priest, a rabbit, and a minister walk into a bar. The bartender asks the rabbit “What are you doing in here?” The rabbit replies “Autocorrect.”
Forum: Hardware 2022-06-24, 23:03
Replies: 248
Views: 55,713
Posted By ewmayer
After crunching hard for 18 months, my...

After crunching hard for 18 months, my bargain-refurb KNL workstation went "boink" at beginning of May. Suspect the MoBo - possibly the CPU - but after a fair bit of fruitless attempted fault-tracing...
Forum: Flea Market 2022-06-24, 22:57
Replies: 0
Views: 1,985
Posted By ewmayer
6 x 32GB Samsung-Compatible DDR4-2400 ECC Registered Server RAM

Samsung 32GB M393A4K40CB1-CRC DDR4-2400 ECC RDIMM 2Rx4 OEM Compatible Registered Server RAM (6 Sticks available)

$89.95 each or all 6 sticks for $500

These were pulled out of an Intel...
Forum: Soap Box 2022-06-20, 22:26
Replies: 6
Views: 982
Posted By ewmayer
Yahoo! Finance explains why Crypto is not merely...

Yahoo! Finance explains why Crypto is not merely a massively more environmentally destructive techno-iteration of Tulip mania (the italicized snip is literal-copy from the Yahoo headlines section of...
Forum: Mlucas 2022-06-16, 21:58
Replies: 28
Views: 3,187
Posted By ewmayer
Interesting, thanks. Do you now have 2...

Interesting, thanks. Do you now have 2 production-run instances running on the respective 4-core subsets, and if so, what are the respective exponents/runtimes? On Galaxy S7 with its hybrid quadcore...
Forum: Lounge 2022-06-01, 18:32
Replies: 30
Views: 2,426
Posted By ewmayer
Good question - I think a good guide is "does the...

Good question - I think a good guide is "does the proposed construction make sense when applied to a similar common-usage word?" E.g. for the 'e'xample, substitute 'weight' for 'effervescence'. We...
Forum: Lounge 2022-05-31, 22:14
Replies: 30
Views: 2,426
Posted By ewmayer
e[7]: effervescencelessness (e.g. "The...

e[7]: effervescencelessness
(e.g. "The effervescencelessness of the champagne indicated to me that the bottle had been opened some time ago.")
Forum: Lounge 2022-05-31, 19:01
Replies: 4,481
Views: 440,469
Posted By ewmayer
There's also a flip side to this sort of story: ...

There's also a flip side to this sort of story:

Accused of Cheating by an Algorithm, and a Professor She Had Never Met...
Forum: Data 2022-05-25, 22:34
Replies: 110
Views: 8,569
Posted By ewmayer
Arrow Using the 3 now-known factors - a quite...

Using the 3 now-known factors - a quite impressive collection - the cofactor is still composite [C11008], so this is no time to rest on your laurels. :)
Forum: Lounge 2022-05-19, 20:58
Replies: 1,988
RIP
Views: 245,194
Posted By ewmayer
His music for The Bounty...

His music for The Bounty (https://en.wikipedia.org/wiki/The_Bounty_%281984_film%29) was also surprisingly effective in a very nontraditional way. Underrated film IMO, very checkered development...
Forum: FermatSearch 2022-05-14, 21:26
Replies: 14
Views: 8,933
Posted By ewmayer
Thanks, Andreas (and Luigi). Yes, 'type 5'...

Thanks, Andreas (and Luigi).

Yes, 'type 5' is the GIMPS jargon - same as type 1, i.e. a Fermat-PRP, a^(N-1) (mod N), but followed by the Suyama-style cofactor-PRP step. The...
Forum: FermatSearch 2022-05-13, 22:29
Replies: 14
Views: 8,933
Posted By ewmayer
F25-F30 cofactor status

[By way of cross-referencing]

I just posted details/results for my tests of the F25-F30 cofactors here (https://www.mersenneforum.org/showthread.php?p=605833#post605833). Executive Summary:

o...
Forum: Factoring 2022-05-13, 22:16
Replies: 73
Views: 13,489
Posted By ewmayer
OK, so it took a little bit longer...

OK, so it took a little bit longer (https://www.mersenneforum.org/showthread.php?p=605833#post605833) - but from F25 all the way through F30, the latter having required roughly 100x the compute...
Forum: Computer Science & Computational Number Theory 2022-05-13, 22:05
Replies: 83
Views: 38,412
Posted By ewmayer
F25-F30 cofactor status, Part 2

In each case I begin with a quick Pépin-test residue sanity check, summarized here:

In the results below, for each prime factor, 'A: R == ' is the full residue (mod p) and 'B: R ==' is the (mod p)...
Forum: Computer Science & Computational Number Theory 2022-05-13, 21:54
Replies: 83
Views: 38,412
Posted By ewmayer
F25-F30 cofactor status, Part 1

[I PMed a more-or-less-identical draft of this to Prime95, ATH; yorix, jasonp, philmoore and R. Gerbicz yesterday]

F25-F30 cofactor status:

In the context of testing the cofactor-PRP...
Forum: Lounge 2022-05-08, 23:55
Replies: 1,988
RIP
Views: 245,194
Posted By ewmayer
Ghost_of_Kyiv...

Ghost_of_Kyiv (https://en.wikipedia.org/wiki/Ghost_of_Kyiv) | Wikipedia

But while we're on the topic of glue-sniffing, don't let that stop anyone from running out and buying the commemorative...
Forum: GPU Computing 2022-04-18, 19:08
Replies: 45
Views: 8,280
Posted By ewmayer
@Magellan3s: What about int32 performance vs...

@Magellan3s: What about int32 performance vs float32? I'm guessing much of the TF code uses that.

No need for big specs-tables dumps, just the rundown of int32 vs float32 for various GPUs of...
Showing results 1 to 25 of 1000

 
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