mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.35 seconds.
Search: Posts Made By: Dr Sardonicus
Forum: Lounge 2021-12-05, 20:12
Replies: 283
Views: 34,781
Posted By Dr Sardonicus
Saudi Arabia didn't have anything like a written...

Saudi Arabia didn't have anything like a written constitution until the Basic Law of Government (Al-Niẓām al-Asāsī li al-Ḥukm) was established by royal decree in 1992 (amended, 2013).

Article I of...
Forum: Lounge 2021-12-05, 18:40
Replies: 1,810
RIP
Views: 189,620
Posted By Dr Sardonicus
Beat me to it! Here's the AP story...

Beat me to it! Here's the AP story (https://apnews.com/737084f4e606c10a33a15384fbe05967):If memory serves, during the 1988 presidential campaign Dole, indicating his disabled right hand, told his...
Forum: Lounge 2021-12-05, 14:41
Replies: 283
Views: 34,781
Posted By Dr Sardonicus
I noticed the following two events listed...

I noticed the following two events listed consecutively at On This Day (https://www.onthisday.com/). I thought the second in particular might be of interest.

1933 Prohibition ends in the US when...
Forum: Science & Technology 2021-12-04, 14:53
Replies: 516
Views: 89,270
Posted By Dr Sardonicus
Indonesia volcano: Residents flee as Mt Semeru...

Indonesia volcano: Residents flee as Mt Semeru spews huge ash cloud (https://www.bbc.com/news/world-asia-59532251)UPDATE: Indonesia volcano: Volcano rescuers face ash as high as rooftops...
Forum: Prime Gap Searches 2021-12-04, 14:38
Replies: 5
Views: 229
Posted By Dr Sardonicus
I note that for a given x, the sequence of least...

I note that for a given x, the sequence of least primes with all g's \ge x for increasing n (down a given column of the table) is monotone increasing; likewise for a given n and increasing lower...
Forum: Hardware 2021-12-03, 15:55
Replies: 10
Views: 2,568
Posted By Dr Sardonicus
US government sues to block $40 billion...

US government sues to block $40 billion Nvidia-Arm chip deal (https://apnews.com/article/technology-business-lifestyle-europe-united-kingdom-d8d599c15b4f4e14e6f7b3f78d09ef07)
Forum: Puzzles 2021-12-02, 13:52
Replies: 4
Views: 342
Posted By Dr Sardonicus
They need a proofreader! That should be has! ...

They need a proofreader! That should be has!

Leave making typos to me - I make enough for everybody!
Forum: And now for something completely different 2021-12-01, 20:29
Replies: 17
Views: 7,763
Posted By Dr Sardonicus
Really? lift(Mod(2,10^4)^82589933 - 1) =...

Really?

lift(Mod(2,10^4)^82589933 - 1) = 2591
lift(Mod(2,10^6)^82589933 - 1) = 902591
lift(Mod(2,10^73)^82589933 - 1) = 4472526640076912114355308311969487633766457823695074037951210325217902591...
Forum: Miscellaneous Math 2021-12-01, 17:28
Replies: 1
Views: 66
Posted By Dr Sardonicus
It depends on what you're given first. If r...

It depends on what you're given first.

If r = x1 is a Pisot number (an algebraic integer > 1 whose algebraic conjugates x2,... xn all have absolute value less than 1) then for positive integer k,...
Forum: Lounge 2021-12-01, 16:21
Replies: 185
Views: 13,820
Posted By Dr Sardonicus
That depends. A 2-digit day number is sometimes...

That depends. A 2-digit day number is sometimes obligatory for filling in dates on forms (MM/DD/YY). With that convention, 12/11/21 and 12/22/21 are the only ones left standing for this month.
Forum: Lounge 2021-12-01, 13:30
Replies: 1,531
Views: 161,820
Posted By Dr Sardonicus
An FDA panel supports Merck COVID drug in mixed...

An FDA panel supports Merck COVID drug in mixed vote (https://www.npr.org/sections/health-shots/2021/11/30/1060130774/an-fda-panel-supports-merck-covid-drug-in-mixed-vote)
Forum: Lounge 2021-11-30, 22:40
Replies: 283
Views: 34,781
Posted By Dr Sardonicus
And they decided to celebrate in style! ...

And they decided to celebrate in style!

Barbados bids farewell to British monarchy, becomes republic...
Forum: Lounge 2021-11-30, 17:54
Replies: 1,531
Views: 161,820
Posted By Dr Sardonicus
Three weeks ago, the Great State of Colorado...

Three weeks ago, the Great State of Colorado activated Crisis Standards of Care for hospital staffing statewide. Here's an update. I noticed something bearing on the current line of discussion. (my...
Forum: And now for something completely different 2021-11-30, 16:22
Replies: 17
Views: 7,763
Posted By Dr Sardonicus
It occurred to me to wonder how likely it might...

It occurred to me to wonder how likely it might be that an L-digit block of decimal digits of Mp is prime. I'll assume that L is large enough to make it interesting, but small compared to the number...
Forum: Lounge 2021-11-30, 14:25
Replies: 4,402
Views: 377,578
Posted By Dr Sardonicus
Apparently Lenin had a reputation as quite the...

Apparently Lenin had a reputation as quite the orator. I heard attributed to one of the old Bolsheviks which was, as best I can recall: "When Trotsky spoke, we stood enthralled. When Lenin spoke -...
Forum: Number Theory Discussion Group 2021-11-30, 13:53
Replies: 15
Views: 790
Posted By Dr Sardonicus
Not AFAIK. Probably better to ask whether any...

Not AFAIK. Probably better to ask whether any Mersenne numbers are Carmichael numbers. I will here restrict this question to prime exponents, since Mn has algebraic factors so is obviously...
Forum: And now for something completely different 2021-11-30, 03:16
Replies: 17
Views: 7,763
Posted By Dr Sardonicus
I get Gleitkomma = floating point; Rechner =...

I get

Gleitkomma = floating point; Rechner = computer; Heizgerät = heating device

The word for computer sounds very close to "reckoner." I like that!

I'm not sure how the results are being...
Forum: MattcAnderson 2021-11-30, 00:14
Replies: 10
Views: 247
Posted By Dr Sardonicus
I challenge you to justify this statement. ...

I challenge you to justify this statement. Bronze is not an element. The term "metal," though applicable especially to metallic elements, is also generally applicable to any substance that has the...
Forum: Lounge 2021-11-29, 20:17
Replies: 1,531
Views: 161,820
Posted By Dr Sardonicus
This line of discussion may bear on the disparity...

This line of discussion may bear on the disparity in case-fatality ratios in different countries. I'm not willing to chalk it all up to variations in detection and the reporting process.

One...
Forum: Information & Answers 2021-11-29, 19:52
Replies: 19
Views: 1,424
Posted By Dr Sardonicus
In the spirit of "20 is an arbitrary parameter,"...

In the spirit of "20 is an arbitrary parameter," the following mindless script looks for a triple p, p + 2, p + k which are consecutive primes, for even integers k > 2 which are not congruent to 1...
Forum: Homework Help 2021-11-29, 16:05
Replies: 24
Views: 4,389
Posted By Dr Sardonicus
Of course! And for 0 < k < p,...

Of course! And for 0 < k < p, \frac{p!}{k!(p-k)!} clearly is divisible by p because the denominator is composed of factors less than p.

The result can be extended slightly. Since p divides...
Forum: FermatSearch 2021-11-29, 14:43
Replies: 345
Views: 82,994
Posted By Dr Sardonicus
Thanks for posting the news! From the Fermat...

Thanks for posting the news!

From the Fermat Search News page (http://www.fermatsearch.org/news.html):
Forum: Information & Answers 2021-11-29, 13:51
Replies: 19
Views: 1,424
Posted By Dr Sardonicus
Just to make the list a bit more exclusive, I...

Just to make the list a bit more exclusive, I told Pari-GP to look for primes p such that p + 2 and p + 18 were the next two consecutive primes. With the small limit I chose, it would have taken...
Forum: MattcAnderson 2021-11-29, 13:39
Replies: 10
Views: 247
Posted By Dr Sardonicus
It seems there is a sequence of "metallic ratios"...

It seems there is a sequence of "metallic ratios" or metallic means (https://everything.explained.today/Metallic_mean/), the nth being given by the simple continued fraction [n;n,n,n,n,...] which...
Forum: Miscellaneous Math 2021-11-29, 13:21
Replies: 431
Views: 41,061
Posted By Dr Sardonicus
If only you had found long beforehand the...

If only you had found long beforehand the "symbolic exponents" indicating the "hidden" Mersenne prime exponents from 1398269 to 82589933 were close by!

Think - just think! how far the work of...
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 23:06.


Sun Dec 5 23:06:05 UTC 2021 up 135 days, 17:35, 0 users, load averages: 1.78, 1.63, 1.48

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.