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Forum: FermatSearch 2021-03-02, 01:50
Replies: 332
Views: 54,192
Posted By Batalov
:thumbs-up:

:thumbs-up:
Forum: Miscellaneous Math 2021-02-27, 02:08
Replies: 11
Views: 382
Posted By Batalov
First of all, this is simply false*, and secondly...

First of all, this is simply false*, and secondly what does it have to do with the subject of this thread!?
Only prime n are of interest for this thread, and for them gcd() is "1", and Phi() is...
Forum: sweety439 2021-02-26, 02:35
Replies: 1,215
Views: 60,612
Posted By Batalov
Thumbs down This is getting silly! (Cue Monty Python...

This is getting silly! (Cue Monty Python Lieutenant).

Get yourself a web site not dissimilar to "norpimeslefbehind" and do this trivially-small-but changing-every-day maintenance there! Yourself. ...
Forum: Reading 2021-02-25, 23:49
Replies: 15
Views: 2,788
Posted By Batalov
I remember that we had the first wave of the...

I remember that we had the first wave of the series' impressions; I will not repeat what I wrote there. In short, it was heart-touchingly accurate (I'd lived in those times, though not in Chernobyl;...
Forum: Lounge 2021-02-23, 09:25
Replies: 1,100
Views: 85,528
Posted By Batalov
Where is 111 less than 99? A: on the...

Where is 111 less than 99?

A: on the microwave time pad. 111 will be 1:11, but 99 will be 99s.
Forum: Reading 2021-02-22, 23:30
Replies: 15
Views: 2,788
Posted By Batalov
Lightbulb Amusing: A tell-tale typo! Chernobyl =...

Amusing: A tell-tale typo!

Chernobyl = Чернобыль = "Black tale"
Chrenobyl = Хренобыль = "хреновая быль" =(is a universal euphemism for:) "х...вая быль" = "f...ing bad tale"

Not really; it...
Forum: Miscellaneous Math 2021-02-22, 01:56
Replies: 10
Views: 328
Posted By Batalov
Thumbs down Really? So if p=11 is a prime number, then...

Really?
So if p=11 is a prime number, then 2^11-1 "is always prime number"?
Forum: Information & Answers 2021-02-20, 23:51
Replies: 11
Views: 857
Posted By Batalov
Lightbulb This message (below) casts serious doubt even on...

This message (below) casts serious doubt even on the statement above!
Forum: GPU Computing 2021-02-20, 22:46
Replies: 12
Views: 516
Posted By Batalov
If one of the fans stops, then it is near the end...

If one of the fans stops, then it is near the end of its lifetime. Just like any fan (even the old airplane propeller) - do help it to start again by flicking it in its intended direction (may need...
Forum: GPU Computing 2021-02-18, 01:24
Replies: 12
Views: 516
Posted By Batalov
This noise is the sound from ball bearing (or...

This noise is the sound from ball bearing (or similar. needle bearing etc) support for the fans.

There are some (temporary) solutions: e.g. you carefully press into the center of the fan's head;...
Forum: Miscellaneous Math 2021-02-17, 21:38
Replies: 32
Views: 1,378
Posted By Batalov
This thread is still not in Misc.Math? :rolleyes:

This thread is still not in Misc.Math? :rolleyes:
Forum: Miscellaneous Math 2021-02-17, 01:42
Replies: 2
Views: 151
Posted By Batalov
Question Why can't I find this formula in Wiki or Wolfram? (pet peeve)

For Lucas numbers:
[$]{L(3n) \over L(n)} = L(2n)-(-1)^n[/$]
...or if n is even, simpler still: [$]{L(6m) \over L(2m)} = L(4m)-1 [/$]

For example: this simplifies L2250 (or primV(2250)) cofactor...
Forum: Homework Help 2021-02-17, 00:42
Replies: 8
Views: 509
Posted By Batalov
Lightbulb Here it is: Let's demonstrate this on a...

Here it is:


Let's demonstrate this on a greatly simplified example:
1. I want to find the density of primes of kind k * n with k=4 (for example), "... based purely on the prime number theorem...
Forum: Miscellaneous Math 2021-02-16, 09:29
Replies: 72
Views: 2,255
Posted By Batalov
I still think that he is fixing his wristwatch...

I still think that he is fixing his wristwatch (https://en.wikipedia.org/wiki/Hatter_(Alice's_Adventures_in_Wonderland)) with a bread knife...
Forum: Homework Help 2021-02-16, 09:17
Replies: 8
Views: 509
Posted By Batalov
You ask one question, and then you ask a...

You ask one question, and then you ask a different question.

For you question about k * 2^n - 1, obviously depends on k. There exist some k values for which the answer is a constant. (zero!)
Forum: Homework Help 2021-02-16, 08:59
Replies: 8
Views: 509
Posted By Batalov
See Lenstra-Pomerance conjecture in...

See Lenstra-Pomerance conjecture in https://primes.utm.edu/notes/faq/NextMersenne.html or Wiki...
Forum: Science & Technology 2021-02-16, 08:53
Replies: 116
Views: 5,269
Posted By Batalov
Lightbulb Interesting - It seems that the antibody test...

Interesting - It seems that the antibody test that BloodBank uses (after blood donation; namely "Vitros Total Anti-SARS-CoV-2"; it tests against S1 protein) becomes positive after Moderna vac.
Some...
Forum: Software 2021-02-15, 02:44
Replies: 11
Views: 417
Posted By Batalov
Smile "No, I mean, turn to your left right now!" ...

"No, I mean, turn to your left right now!"
"What, left?"
"Right!!"
Forum: Hardware 2021-02-14, 07:17
Replies: 2
Views: 266
Posted By Batalov
Try...

Try https://www.pc-specs.com/cpu/Intel/Xeon/Xeon_Processor_W3670/2329/Compatible_Motherboards ?
Newegg seems to have some refurbs for sale, but because this chip is from 2010 it might get tricky to...
Forum: Homework Help 2021-02-13, 19:53
Replies: 3
Views: 283
Posted By Batalov
Lightbulb This reminds me of the George Pólya book How to...

This reminds me of the George Pólya book How to Solve It (https://en.wikipedia.org/wiki/How_to_Solve_It).
Everyone could do very well by reading it. (Some time in their life, I mean.)
Nick's...
Forum: Cunningham Tables 2021-02-12, 23:52
Replies: 17
Views: 1,626
Posted By Batalov
The latter. (Usually Sam did that ecm'ming...

The latter. (Usually Sam did that ecm'ming himself; recently he started opening these to the public. You can safely assume that a t55 level is definitely already done on all of these.)

It does...
Forum: Information & Answers 2021-02-12, 23:42
Replies: 26
Views: 885
Posted By Batalov
Cool Wow! If only it could be built. :confus: ...

Wow! If only it could be built.
:confus:

Wait a minute! It actually has been built!
It finds only one coin (previously) per year, and now maybe one every several years.
An every coin owner is...
Forum: Cunningham Tables 2021-02-12, 19:58
Replies: 17
Views: 1,626
Posted By Batalov
Yeah, for this table I did not put "/q" hints (in...

Yeah, for this table I did not put "/q" hints (in the last/"comment" column) - because not all of them are.

There are many easy sextics there, but there is no compelling reason to do them right...
Forum: FermatSearch 2021-02-10, 18:03
Replies: 12
Sticky: gfn results
Views: 5,169
Posted By Batalov
Thumbs up I can post these (and attribute to you... I...

I can post these (and attribute to you... I think. No it appears that I can't, and cannot with Anonymous either)
Generally it is with &comment=1 added to the URL, by hand.
You can email to C.C.
Forum: Miscellaneous Math 2021-02-10, 17:53
Replies: 72
Views: 2,255
Posted By Batalov
This is immensely slow. (like others already told...

This is immensely slow. (like others already told you)
You are trying to fix a wristwatch with a bread knife.
Read the suggested literature first, then rethink your bread-knife strategy.
Showing results 1 to 25 of 1000

 
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