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Forum: greenskull 2021-10-26, 23:30
Replies: 18
Views: 145
Posted By Dr Sardonicus
The transcript of the NOVA episode Magnetic Storm...

The transcript of the NOVA episode Magnetic Storm (https://www.pbs.org/wgbh/nova/transcripts/3016_magnetic.html) (November 18, 2003) may be of interest.
Forum: greenskull 2021-10-26, 20:09
Replies: 52
Views: 960
Posted By Dr Sardonicus
Isn't it obvious? The microphone is an item of...

Isn't it obvious? The microphone is an item of advanced technology provided to the troupe by a visitor from an alien civilization.[/QUOTE]I'm sure it's obvious to someone. But that someone is not...
Forum: Riesel Prime Search 2021-10-25, 20:53
Replies: 290
Views: 50,195
Posted By Dr Sardonicus
The number of decimal digits in pk is roughly...

The number of decimal digits in pk is roughly pk/ln(10). We have

? 3267113/log(10)
%1 = 1418889.1476543787883927627556683863802

As indicated above, 3267113# - 1 actually has 1418398 digits.
...
Forum: greenskull 2021-10-25, 20:12
Replies: 52
Views: 960
Posted By Dr Sardonicus
Your confounding a hurdy-gurdy with a barrel...

Your confounding a hurdy-gurdy with a barrel organ must be deliberate...
Forum: greenskull 2021-10-25, 02:05
Replies: 52
Views: 960
Posted By Dr Sardonicus
Organ player? :grin: (Strokes beard) I...

Organ player? :grin:

(Strokes beard) I seeeee...
:missingteeth: :missingteeth::missingteeth: :missingteeth:

Thanks - you're doing a fine job entertaining me!
Forum: greenskull 2021-10-25, 00:19
Replies: 35
Views: 549
Posted By Dr Sardonicus
A couple of SF spoofs or satires worthy of note...

A couple of SF spoofs or satires worthy of note are

Hardware Wars (1978) In the form of a 13-minute "trailer" of an imagined Star Wars parody.

Attack of the Killer Tomatoes (1978)

Then there...
Forum: Number Theory Discussion Group 2021-10-24, 23:21
Replies: 2
Views: 166
Posted By Dr Sardonicus
Let's see. det(Mk) = (det(M))k. So if...

Let's see. det(Mk) = (det(M))k.

So if det(M) = -2, det(M2p) = (-2)2p = 22p == 1 (mod 2p - 1). Check.

I don't see any relation to factorization.
Forum: greenskull 2021-10-24, 21:08
Replies: 35
Views: 549
Posted By Dr Sardonicus
The Day the Earth Stood Still (1951) (loosely)...

The Day the Earth Stood Still (1951) (loosely) based on the short story Farewell to the Master by Harry Bates

A couple about the possible consequences of nukes:

On the Beach (1959) Based on the...
Forum: Miscellaneous Math 2021-10-24, 19:31
Replies: 26
Views: 882
Posted By Dr Sardonicus
Perhaps the OP thinks you can simply feed a...

Perhaps the OP thinks you can simply feed a proposed value (say 9) for 3^(2^p) (mod 2^p - 1) into the verifier, and be able to do a cheap computation to see whether it's right, without actually...
Forum: greenskull 2021-10-24, 16:19
Replies: 35
Views: 549
Posted By Dr Sardonicus
(My emphasis) I have not seen it. Also sprach...

(My emphasis)
I have not seen it. Also sprach Zarathustra that I posted in Muzak thread is just coincidence.[/QUOTE]
Forum: Miscellaneous Math 2021-10-24, 16:06
Replies: 26
Views: 882
Posted By Dr Sardonicus
Please explain how to verify that 3^(2^p) == 3^2...

Please explain how to verify that 3^(2^p) == 3^2 (mod 2^p - 1) without computing 3^(2^p) (mod 2^p -1).
Forum: greenskull 2021-10-24, 14:38
Replies: 35
Views: 549
Posted By Dr Sardonicus
+1

+1
Forum: greenskull 2021-10-24, 13:45
Replies: 35
Views: 549
Posted By Dr Sardonicus
Le Voyage dans la Lune (A Trip to the Moon)...

Le Voyage dans la Lune (A Trip to the Moon) (1902) Adapted from (among other things) Jules Verne's De la Terre à la Lune, trajet direct en 97 heures 20 minutes

Metropolis (1927) Rotwang is the...
Forum: greenskull 2021-10-24, 01:45
Replies: 52
Views: 960
Posted By Dr Sardonicus
A microphone in a 17th century painting seems...

A microphone in a 17th century painting seems unlikely. I prefer the description of the leftmost figure as being an old woman holding a broom.Or else the two are merely depicted as sharing their...
Forum: MattcAnderson 2021-10-23, 13:04
Replies: 2
Views: 62
Posted By Dr Sardonicus
This should fill the bill.

This should fill the bill.
Forum: Lounge 2021-10-22, 19:16
Replies: 403
Views: 61,873
Posted By Dr Sardonicus
Oh, dear, that sounds quite Syrious - this is why...

Oh, dear, that sounds quite Syrious - this is why one should never attach bombs in, or to, one's home.[/QUOTE]I blinked at the amount of money. The first period should be a comma, or the first comma...
Forum: greenskull 2021-10-22, 18:14
Replies: 5
Views: 171
Posted By Dr Sardonicus
That is my understanding of the proverb's...

That is my understanding of the proverb's meaning.

But somebody rendered 1000 li and 10,000 li into a range of specific distances, and drew a comparison to "a one-way Columbus journey." :grin:
...
Forum: Miscellaneous Math 2021-10-22, 16:54
Replies: 26
Views: 882
Posted By Dr Sardonicus
A PRP test can prove a number to be composite,...

A PRP test can prove a number to be composite, but numbers that "pass" a PRP test can be composite. So if you want a proof of primality, you need more.

The LL test is determinative for whether...
Forum: greenskull 2021-10-22, 16:02
Replies: 5
Views: 171
Posted By Dr Sardonicus
You're full of baloney. The page you cite...

You're full of baloney.

The page you cite does not render the proverb that way, and does not even mention Confucius.

According to the very page you cite, Wikipedia's Li (unit)...
Forum: Science & Technology 2021-10-22, 12:33
Replies: 6
Sticky: Poll: COVID vaccine type poll
Views: 341
Posted By Dr Sardonicus
I suppose those who received more than one type...

I suppose those who received more than one type of vaccine could vote "Other."

AFAIK the poll is anonymous, though if you have voted, it does indicate how you voted.

So if you want to know how...
Forum: greenskull 2021-10-21, 23:27
Replies: 7
Views: 337
Posted By Dr Sardonicus
A quest leading to this post...

A quest leading to this post (https://mersenneforum.org/showpost.php?p=582292&postcount=9) :grin:
Forum: Science & Technology 2021-10-21, 15:26
Replies: 274
Views: 23,083
Posted By Dr Sardonicus
Coronavirus (COVID-19) Update: FDA Takes...

Coronavirus (COVID-19) Update: FDA Takes Additional Actions on the Use of a Booster Dose for COVID-19 Vaccines...
Forum: Science & Technology 2021-10-21, 15:26
Replies: 3
Views: 121
Posted By Dr Sardonicus
Coronavirus (COVID-19) Update: FDA Takes...

Coronavirus (COVID-19) Update: FDA Takes Additional Actions on the Use of a Booster Dose for COVID-19 Vaccines...
Forum: Astronomy 2021-10-21, 03:06
Replies: 22
Views: 1,793
Posted By Dr Sardonicus
I wasn't being entirely serious in proposing a...

I wasn't being entirely serious in proposing a fleet of space telescopes. I was responding to a previous post which opined that JWST was a waste of taxpayer money.

It occurred to me that cost...
Forum: Proth Prime Search 2021-10-20, 13:12
Replies: 11
Views: 370
Posted By Dr Sardonicus
That was the only "gfn" I could come up with that...

That was the only "gfn" I could come up with that fit the context, but I wasn't certain that that was it.

One type of GFN is a^(2k) + 1, which none of the examples in this thread appear to be.
...
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