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Forum: Information & Answers 2021-02-24, 20:24
Replies: 20
Views: 433
Posted By CRGreathouse
The answer isn't at all obvious from what you'd...

The answer isn't at all obvious from what you'd read there, so don't get down on yourself.

The way this project had run for a long time was that we'd first run a battery of preliminary tests --...
Forum: Software 2021-02-24, 05:17
Replies: 7
Views: 523
Posted By CRGreathouse
PARI/GP is good, and since PARI is a C library it...

PARI/GP is good, and since PARI is a C library it transitions well into that language for higher-performance computing when needed (you can use gp2c if you want to live in both worlds).
Forum: Miscellaneous Math 2021-02-19, 16:57
Replies: 72
Views: 2,198
Posted By CRGreathouse
See A109461 (https://oeis.org/A109461) and...

See A109461 (https://oeis.org/A109461) and Mersenne Primes: Early history (https://primes.utm.edu/mersenne/#hist).
Forum: Miscellaneous Math 2021-02-19, 15:50
Replies: 72
Views: 2,198
Posted By CRGreathouse
...but you don't know the 165-year-old...

...but you don't know the 165-year-old Lucas-Lehmer test. For comparison, this (http://www.idaillinois.org/digital/collection/stc/id/22/) is what cars looked like 165 years ago, and this...
Forum: Miscellaneous Math 2021-02-18, 13:51
Replies: 18
Views: 1,007
Posted By CRGreathouse
Given a Carmichael number N or a semiprime p*q,...

Given a Carmichael number N or a semiprime p*q, what code do you run against it, exactly? Surely you're not looping over possible a, that would take forever.
Forum: Miscellaneous Math 2021-02-18, 06:01
Replies: 1
Views: 88
Posted By CRGreathouse
They look... strangely non-quantum to me. Maybe...

They look... strangely non-quantum to me. Maybe QMC is quantum, though I've heard the term used for a classical algorithm (simulated quantum annealing (https://arxiv.org/abs/1601.03030)) as well....
Forum: Miscellaneous Math 2021-02-17, 19:14
Replies: 32
Views: 1,048
Posted By CRGreathouse
See also...

See also https://www.loc.gov/standards/iso639-2/php/code_list.php (you could get lost in the ISO 639 standard, but 639-2 is a non-overwhelming subset).
Forum: Miscellaneous Math 2021-01-29, 21:11
Replies: 32
Views: 1,048
Posted By CRGreathouse
There's a lot of knowledge here on these boards...

There's a lot of knowledge here on these boards on sieves and their implementation. But without more information I'm not sure anyone is going to go into that much more detail.
Forum: Miscellaneous Math 2021-01-29, 05:33
Replies: 32
Views: 1,048
Posted By CRGreathouse
Tell on, then! Why do you need to know? This...

Tell on, then! Why do you need to know? This should help us understand which sieves are applicable. For example, would you could the Brun sieve? Probably not, but without knowing what you're doing...
Forum: Miscellaneous Math 2021-01-28, 19:28
Replies: 32
Views: 1,048
Posted By CRGreathouse
The most recent sieve I know of (can do more than...

The most recent sieve I know of (can do more than just primes, for example, could do the mu function or factorizations) is Helfgott's sieve (https://arxiv.org/abs/1712.09130).
Forum: Miscellaneous Math 2021-01-27, 03:41
Replies: 4
Views: 315
Posted By CRGreathouse
I think that's the only pure, nontrivial...

I think that's the only pure, nontrivial alternating sequence in the OEIS at the moment. There are A062157, A105812, A117154, A165326, and A280560 which alternate after some finite prefix, and of...
Forum: Science & Technology 2020-12-29, 21:00
Replies: 116
Views: 5,151
Posted By CRGreathouse
I couldn't find anything on LitCovid or the...

I couldn't find anything on LitCovid or the BNT162b2 trial paper (NEJM).
Forum: ONeil 2020-12-29, 20:51
Replies: 28
Views: 1,121
Posted By CRGreathouse
It's OK to make mistakes, but you should (1) have...

It's OK to make mistakes, but you should (1) have some humility when you're learning a new field and (2) try to learn something from the experience. I took the time to find a short, good page...
Forum: ONeil 2020-12-29, 04:43
Replies: 28
Views: 1,121
Posted By CRGreathouse
> Mod(2,13)^109947391-1 %1 = Mod(10, 13) ...

> Mod(2,13)^109947391-1
%1 = Mod(10, 13)

Sorry, try again next time. You might want to read up (https://primes.utm.edu/glossary/page.php?sort=MersenneDivisor) on the special form of Mersenne...
Forum: Science & Technology 2020-12-29, 02:27
Replies: 116
Views: 5,151
Posted By CRGreathouse
Another group that would warrant more protection...

Another group that would warrant more protection under most epidemiological models is the homeless. Probably the homeless put the community at even higher risk (as they mingle with the community...
Forum: Science & Technology 2020-12-28, 20:33
Replies: 116
Views: 5,151
Posted By CRGreathouse
First: Health care personnel with potential...

First: Health care personnel with potential exposure to COVID patients and LTCF residents (nursing home patients)
Second: Frontline essential workers (First responders [firefighters, police],...
Forum: ONeil 2020-12-26, 04:11
Replies: 49
Views: 2,412
Posted By CRGreathouse
I do believe it has been demonstrated that ONeil...

I do believe it has been demonstrated that ONeil isn't sure of his own predictive abilities. Was anyone surprised? He knows his own track record as well as we do.
Forum: Prime Gap Searches 2020-12-18, 04:10
Replies: 9
Views: 910
Posted By CRGreathouse
If you'd like me to look anything over, post the...

If you'd like me to look anything over, post the A-number here or PM me once it's up. (If you're happy with how it looks, submit for review at the same time; if not, leave it in /draft while you have...
Forum: ONeil 2020-12-18, 03:45
Replies: 84
Views: 2,289
Posted By CRGreathouse
To back up Serge, there are at least three...

To back up Serge, there are at least three currently approved cancer vaccines:
TICE BCG (a therapeutic vaccine for bladder cancer, CIS or more broadly NMIBC)
Hep B (chronic Hep B infection is...
Forum: ONeil 2020-12-15, 18:09
Replies: 84
Views: 2,289
Posted By CRGreathouse
ONeil, every time I try to have a serious...

ONeil, every time I try to have a serious discussion you shut it down. Do you have any serious reasons for your antivaxx sentiment?
Forum: ONeil 2020-12-15, 08:05
Replies: 84
Views: 2,289
Posted By CRGreathouse
Please let me know what parts you found...

Please let me know what parts you found convoluted and I'll see if I can simplify them further.



Pretty much, yes. There are plenty of wise people who are cautious about vaccines, but not a...
Forum: Factoring 2020-12-15, 06:45
Replies: 9
Views: 1,049
Posted By CRGreathouse
Obviously anything on the properties of the sigma...

Obviously anything on the properties of the sigma function is very closely related and would be useful, but you might consider the phi function as well; there's almost a duality between the two...
Forum: ONeil 2020-12-15, 06:28
Replies: 84
Views: 2,289
Posted By CRGreathouse
Why don't you make that more concrete so when the...

Why don't you make that more concrete so when the date rolls around we can know unambiguously if you were right or wrong. What, precisely, are you predicting?
Forum: ONeil 2020-12-15, 06:23
Replies: 84
Views: 2,289
Posted By CRGreathouse
Let's be careful here. There are many different...

Let's be careful here. There are many different products out there, and it would be silly to say that they're either all safe or all unsafe, and similarly that they're either all efficacious or all...
Forum: Factoring 2020-12-14, 21:35
Replies: 9
Views: 1,049
Posted By CRGreathouse
Be agile...

Be agile (https://en.wikipedia.org/wiki/Agile_software_development) and build a minimal product before you even think about building in more features. A working library is better than a great concept...
Showing results 1 to 25 of 1000

 
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