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Forum: Miscellaneous Math 2021-09-20, 13:27
Replies: 9
Views: 260
Posted By Dr Sardonicus
Instead of just hoping to "be lucky," it would be...

Instead of just hoping to "be lucky," it would be a good idea to at least try to check your formulas for divisibility by small primes. Your formula is

N = 2*(10^X - 1)/9 + 7*10^X + 5

This...
Forum: Miscellaneous Math 2021-09-19, 14:08
Replies: 4
Views: 161
Posted By Dr Sardonicus
Congratulations. You've discovered that in the...

Congratulations. You've discovered that in the decimal addition a + a, there's a carry from places whose digits are greater than 4, and no carry from places whose digits are less than 5.
Forum: Lounge 2021-09-19, 01:10
Replies: 1,465
Views: 148,899
Posted By Dr Sardonicus
I love it! "You want to claim a religious...

I love it! "You want to claim a religious objection on these grounds? All righty, then!" This is also described on webmd...
Forum: Lounge 2021-09-18, 15:13
Replies: 1,465
Views: 148,899
Posted By Dr Sardonicus
Back in April... Idaho Doctor Makes Baseless...

Back in April... Idaho Doctor Makes Baseless Claims About Safety of COVID-19 Vaccines...
Forum: Lounge 2021-09-18, 02:41
Replies: 1,465
Views: 148,899
Posted By Dr Sardonicus
Vaccines "save lives" in the commonly-used sense...

Vaccines "save lives" in the commonly-used sense of "save" meaning to rescue or deliver from danger - here, the danger of becoming seriously ill or dying from whatever disease the vaccine protects...
Forum: Lounge 2021-09-17, 16:46
Replies: 1,465
Views: 148,899
Posted By Dr Sardonicus
Even the most impeccably reasoned conclusions are...

Even the most impeccably reasoned conclusions are no better than the assumptions they're based on. Garbage in, garbage out.

From a Forbes article...
Forum: Lounge 2021-09-16, 16:26
Replies: 1,465
Views: 148,899
Posted By Dr Sardonicus
And it's not just COVID-19 patients that are...

And it's not just COVID-19 patients that are affected.So these unfortunate doctors and nurses will probably have to explain to relatives of an accident victim or cardiac patient that their loved one...
Forum: Marin's Mersenne-aries 2021-09-16, 16:10
Replies: 43
Views: 4,015
Posted By Dr Sardonicus
I note that the Countdown to verifying all tests...

I note that the Countdown to verifying all tests below M(57 885 161) (https://www.mersenne.org/assignments/?exp_lo=57223591&exp_hi=57885161&execm=1&exp1=1&extf=1&exfirst=1) has 25 "D" (LL...
Forum: Lounge 2021-09-16, 15:35
Replies: 1,465
Views: 148,899
Posted By Dr Sardonicus
Idaho rations health care statewide as COVID...

Idaho rations health care statewide as COVID surge continues (https://apnews.com/article/health-public-health-coronavirus-pandemic-idaho-a0729894b42af1c3dadeccaffeabea0c)
Forum: Lounge 2021-09-16, 11:44
Replies: 80
Views: 16,345
Posted By Dr Sardonicus
Thanks! Wow, I really outdid myself - I have...

Thanks!

Wow, I really outdid myself - I have no idea how I managed to insert an extra / into the link! Must have been after the copy-paste. The degree of my Black Belt in making typos just went...
Forum: Lounge 2021-09-16, 01:46
Replies: 80
Views: 16,345
Posted By Dr Sardonicus
Invasive insect spotted in 4-H entry at Kansas...

Invasive insect spotted in 4-H entry at Kansas State Fair (https://apnews.com/article/lifestyle-science-animals-kansas-state-fairs-b7fdc664e02ff06308134527f79b16f3)Yes, especially since the furthest...
Forum: Science & Technology 2021-09-16, 01:03
Replies: 505
Views: 84,681
Posted By Dr Sardonicus
Here's hoping the volcano doesn't get too active...

Here's hoping the volcano doesn't get too active too soon.

I note there has also been a recent "earthquake swarm" at Hawaii's Kilauea volcano with tremors of magnitude 3 or less. Kilauea has been...
Forum: Science & Technology 2021-09-15, 16:42
Replies: 505
Views: 84,681
Posted By Dr Sardonicus
Hmm, so it is. I guess I hit the saturation...

Hmm, so it is. I guess I hit the saturation point with the information on the volcano, and didn't pay much attention to the margins. Still, plenty of actual info there.

Exaggerating the danger...
Forum: Lounge 2021-09-15, 16:09
Replies: 1,465
Views: 148,899
Posted By Dr Sardonicus
Pope questions vaccine skeptics, including...

Pope questions vaccine skeptics, including cardinals (https://apnews.com/article/health-religion-coronavirus-pandemic-pope-francis-raymond-burke-b2f2b16321f0275e7b57fbadbd5cfaec)
Forum: Science & Technology 2021-09-15, 15:07
Replies: 505
Views: 84,681
Posted By Dr Sardonicus
La Palma, Canary Islands: seismic crisis Sep 2021...

La Palma, Canary Islands: seismic crisis Sep 2021 - updates (https://www.volcanodiscovery.com/lapalma/sep2021seismic-crisis/current-activity.html)Hmm, I wonder of that should be 2.5 cm, since 1.5 cm...
Forum: FactorDB 2021-09-15, 13:58
Replies: 15
Views: 1,555
Posted By Dr Sardonicus
IMO any submission to factordb of a "composite...

IMO any submission to factordb of a "composite with no known factors" which is "too small" (fewer than 70 decimal digits, say) should be rejected out of hand. IMO those flooding, or trying to flood...
Forum: Languages -- Ancient & Modern, Human & Machine 2021-09-15, 13:29
Replies: 40
Views: 5,846
Posted By Dr Sardonicus
I have long been familiar with the term "quack"...

I have long been familiar with the term "quack" meaning a medical charlatan. I had never bothered looking up the etymology.

I have now done so. And what to my wondering eyes should appear, but...
Forum: Number Theory Discussion Group 2021-09-14, 12:30
Replies: 21
Views: 1,089
Posted By Dr Sardonicus
Thanks for that info. I am interested in this for...

Thanks for that info. I am interested in this for personal reasons,so i'll try that out[/QUOTE]I can not improve on the sources already cited. The information you are thanking me for here, I had...
Forum: Number Theory Discussion Group 2021-09-14, 01:51
Replies: 21
Views: 1,089
Posted By Dr Sardonicus
Just to be clear, the lines were marked "Wasted...

Just to be clear, the lines were marked "Wasted effort" because the candidates were congruent to 3 or 5 (mod 8), hence ineligible. Simply avoiding those candidates would cut the run time of your...
Forum: Number Theory Discussion Group 2021-09-14, 01:22
Replies: 21
Views: 1,089
Posted By Dr Sardonicus
FTFY

FTFY
Forum: Number Theory Discussion Group 2021-09-13, 14:18
Replies: 21
Views: 1,089
Posted By Dr Sardonicus
Assuming your code is supposed to do trial...

Assuming your code is supposed to do trial division of 2^k - 1 for odd k by numbers congruent to 1 (mod 2k) (and maybe it's just me, but I found your code to be excessively obscure), I note the...
Forum: Lounge 2021-09-12, 01:35
Replies: 79
Views: 13,334
Posted By Dr Sardonicus
Would you prefer square furlongs per...

Would you prefer square furlongs per fortnight?[/quote]No, I was amused by the whole notion of "tornadoes relative to land area." As long as it's "tornadoes per unit time per unit area" using the...
Forum: Lounge 2021-09-11, 13:21
Replies: 79
Views: 13,334
Posted By Dr Sardonicus
:rofl:

:rofl:
Forum: Lounge 2021-09-11, 12:44
Replies: 79
Views: 13,334
Posted By Dr Sardonicus
That's awful. I wonder when, if ever, there is a...

That's awful. I wonder when, if ever, there is a previous tornado on Pantelleria recorded in the annals of history.

Tornadoes are much less frequent in Europe than in the US, and my impression is...
Forum: Lounge 2021-09-10, 16:53
Replies: 1,465
Views: 148,899
Posted By Dr Sardonicus
This is sheer demagoguery. The "common good"...

This is sheer demagoguery.

The "common good" is a recognized legal concept. One of the objectives of the Constitution of the United States, as stated in its Preamble, is "to promote the general...
Showing results 1 to 25 of 1000

 
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