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Forum: Miscellaneous Math 2021-12-07, 02:54
Replies: 36
Views: 2,326
Posted By Batalov
Smile I don't remember exact time that I came across...

I don't remember exact time that I came across this but this is how it worked for ages. I am glad to hear that they fixed, but once burnt I don't want to test this with every release.

The logic...
Forum: Miscellaneous Math 2021-12-07, 01:39
Replies: 36
Views: 2,326
Posted By Batalov
Exclamation My pet peeve for Pari/GP is that all operators in...

My pet peeve for Pari/GP is that all operators in logical operations are estimated (very different from C or even perl - in them if you write if(a && b) {} -- and a is false, b is not computed. In...
Forum: Homework Help 2021-12-07, 01:23
Replies: 10
Views: 152
Posted By Batalov
That's like when a college student is required to...

That's like when a college student is required to run a mile, and instead asks you to give them a lift to 10 feet from the finish line. "I will still have to run 10 feet, right?"
Forum: And now for something completely different 2021-12-06, 21:07
Replies: 94
Views: 27,811
Posted By Batalov
I guess Neil was typing fast. Of course it is a...

I guess Neil was typing fast. Of course it is a PRP (it is 177719 decimal digits in length; btw, apparently I just now added it to FactorDB (http://factordb.com/index.php?id=1100000001550303311) for...
Forum: Homework Help 2021-12-06, 19:29
Replies: 10
Views: 152
Posted By Batalov
Wink One shall be ashamed of credit that they didn't...

One shall be ashamed of credit that they didn't deserve.
Forum: Homework Help 2021-12-06, 18:08
Replies: 10
Views: 152
Posted By Batalov
Thumbs down This looks like a homework (and wrong forum), and...

This looks like a homework (and wrong forum), and now the homework is ruined.
S/he will simply turn it in and get credit that s/he doesn't deserve.
Forum: And now for something completely different 2021-12-05, 20:07
Replies: 94
Views: 27,811
Posted By Batalov
Lightbulb Extending A176024 - in progress...

Challenge accepted!

I wrote a different sieve for Smr(n), sieved and (with Ryan) we will test the survivors up to n<=500000 for starters.

A few interesting facts:
1. Both Sm(n) and Smr(n) are...
Forum: Miscellaneous Math 2021-12-02, 21:24
Replies: 4
Views: 264
Posted By Batalov
Cool Well, this was actually, two separate threads in...

Well, this was actually, two separate threads in two different subforums (so it was "nearly spam", either way.
Arguably, it is even worse to create multiple threads with repeated content.).

The...
Forum: Proth Prime Search 2021-12-02, 18:08
Replies: 13
Views: 19,538
Posted By Batalov
Thumbs up It is one of the Extended Sierpinski Project...

It is one of the Extended Sierpinski Project (http://www.primegrid.com/stats_esp_llr.php).

(That is, proving the next Sierpinski constant, while proving the first one...
Forum: Lounge 2021-11-30, 07:50
Replies: 4,402
Views: 378,120
Posted By Batalov
Cool "10 stupid questions to..." "...a mathematician"

EYsr0DZWMCg

There was a good Russian modernist poet (https://en.wikipedia.org/wiki/Vladimir_Mayakovsky) who adapted to the 1917 revolution and became a sort of an agitator and propagandist - and...
Forum: And now for something completely different 2021-11-30, 03:55
Replies: 17
Views: 7,783
Posted By Batalov
Mark R. actually wrote a sieve for that. I used...

Mark R. actually wrote a sieve for that.
I used my own because it was way before that. (The sharp eyes will notice that this thread is from '16; but actually there was one even before that; then...
Forum: Number Theory Discussion Group 2021-11-29, 23:19
Replies: 15
Views: 806
Posted By Batalov
Thank you for answering the rhetorical question....

Thank you for answering the rhetorical question. :rolleyes:

The '-' sign happens exactly at q=3.
(Which makes a-PRP still work, even for q=3, because you square both sides for the last time in...
Forum: Number Theory Discussion Group 2021-11-29, 22:08
Replies: 15
Views: 806
Posted By Batalov
Also, suggestion for simplification of your...

Also, suggestion for simplification of your statement.

Your a=1+√2 (mod p) -- much simpler to look at.
Are you saying that [$]a^{{p+1}\over 2} = a[/$] (mod p) ?
That's the same* as ap = a (mod...
Forum: Number Theory Discussion Group 2021-11-29, 21:46
Replies: 15
Views: 806
Posted By Batalov
What made you think that this is a 'new...

What made you think that this is a 'new conjecture'?

Your original thread title was false and misleading: 'Potential new primality test for Mersenne numbers'.
One moderator implemented your...
Forum: Number Theory Discussion Group 2021-11-29, 21:38
Replies: 15
Views: 806
Posted By Batalov
Unreasonable. Because it is 100-200 years too...

Unreasonable.
Because it is 100-200 years too late (as a string of letters).
If there is not even shard of a proof or even a sketch, then what does it add?
If there is, we are eager to hear it....
Forum: And now for something completely different 2021-11-29, 10:34
Replies: 17
Views: 7,783
Posted By Batalov
=SB

=SB
Forum: And now for something completely different 2021-11-26, 22:09
Replies: 56
Views: 9,576
Posted By Batalov
CPAP-7 (466 digits) is not in there.

CPAP-7 (466 digits) is not in there.
Forum: And now for something completely different 2021-11-26, 22:05
Replies: 71
Views: 8,719
Posted By Batalov
Our project was completely independent -...

Our project was completely independent - independent sieve and independent testing. We do not coordinate with that site. We cannot help you (or that site) document what you for some idle reason want...
Forum: And now for something completely different 2021-11-22, 00:49
Replies: 70
Views: 5,586
Posted By Batalov
Well, if it is maintained in this way, then only...

Well, if it is maintained in this way, then only Table 1 from it is meaningful, really, because the rest is prone to a lot of errors of omission.

For example if you forget to put the 6-Tuplet...
Forum: And now for something completely different 2021-11-21, 23:10
Replies: 70
Views: 5,586
Posted By Batalov
See section "5"...

See section "5" (http://www.pzktupel.de/JensKruseAndersen/simultprime.htm#history5). What CPAPs do you see?
Then see section "6" (https://www.pzktupel.de/JensKruseAndersen/simultprime.htm#history6)....
Forum: And now for something completely different 2021-11-21, 21:54
Replies: 70
Views: 5,586
Posted By Batalov
I scanned through simultprime page and I see...

I scanned through simultprime page and I see (*near the bottom) that this is simply a union of five disparate classes.
Many recent CPAPs are missing from this page; for uniformity it is probably...
Forum: And now for something completely different 2021-11-21, 20:55
Replies: 56
Views: 9,576
Posted By Batalov
CPAP-7

CPAP-7 proper record:

145706980166212*1069#+x253+210*n, n=2..8 (466 digits...
Forum: And now for something completely different 2021-11-20, 06:16
Replies: 56
Views: 9,576
Posted By Batalov
Cool new CPAP-9 record

A new CPAP-9 updated record

7661619169627*379#+x153+210*n, n=0..8 (167 digits...
Forum: Lounge 2021-11-19, 08:09
Replies: 1,057
Views: 86,838
Posted By Batalov
Thumbs up pXezLv_5RaY

pXezLv_5RaY
Forum: And now for something completely different 2021-11-18, 21:51
Replies: 71
Views: 8,719
Posted By Batalov
Lightbulb Not all those who can read, can comprehend. Also,...

Not all those who can read, can comprehend. Also, not all those who can read, actually do read.

Hint: re-read the complete text of A004023 (https://oeis.org/A004023). What, upon reading, becomes...
Showing results 1 to 25 of 1000

 
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