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-   -   Aliquot sequence reservations (https://www.mersenneforum.org/showthread.php?t=11588)

charybdis 2021-06-17 11:13

[QUOTE=bur;581215]Release 86610
Take 2360[/QUOTE]

Hmmm....

[QUOTE=charybdis;579728]Take 2360

(I presume this is OK? The status page says Christophe Clavier should be contacted about reservation requests below 10000, but his site hasn't been updated since 2017)[/QUOTE]

[QUOTE=charybdis;579775]None of the sequences listed as reserved by him have seen progress since January 2019: I wouldn't call that "progressing". The March update to 2360 was me. This sequence was reserved by Tom Womack (fivemack) when Clavier's site was last updated, but he [URL="https://mersenneforum.org/showthread.php?p=521278#post521278"]unreserved[/URL] it in July 2019.

The blue page hasn't updated with my reservation. Does it not automatically update reservations below 10000? [COLOR="Red"](indeed turns out it doesn't)[/COLOR]

I tried sending Clavier an email at the address listed on his site, and got an "address not found" error. I've found an updated email address; we'll see what he has to say.[/QUOTE]

[QUOTE=charybdis;579781]Clavier got back to me:



So it should be OK to work in this range, and presumably also to work on sequences listed as reserved by him.[/QUOTE]

FYI the sequence is currently at line 2514. The numbers got smaller quite quickly, so I haven't updated it in factordb because I figured that would make it less likely someone else would start working on it. Oh well...

bur 2021-06-18 07:20

I was wondering why it didn't update the reservation status, but since other < 10000 number actually did show reservation by someone I assumed it wasn't reserved.

[QUOTE]FYI the sequence is currently at line 2514. The numbers got smaller quite quickly, so I haven't updated it in factordb because I figured that would make it less likely someone else would start working on it. Oh well...[/QUOTE]Well, until someone like me was explicitly looking for c160 numbers... Would you mind uploading the sequence to factordb? Otherwise similar "accident" might happen. And it'd be interesting to see if the sequence could actually be terminated.

Did you hear back from Clavier? If he's ok with it, the numbers could be included in the blue page system.


Take 32796

charybdis 2021-06-18 11:08

[QUOTE=bur;581319]Well, until someone like me was explicitly looking for c160 numbers... Would you mind uploading the sequence to factordb? Otherwise similar "accident" might happen. And it'd be interesting to see if the sequence could actually be terminated.[/quote]

I thought that people would be more likely to look for sequences without drivers and with small composites than for c160s to factor. And that might still be true, so I'm going to hold off for now. To give you an idea of what I mean, here is the current status of the sequence, at line 2855:

[code][COLOR="blue"]2527215137...24[/COLOR]<106> = 2^3 · 13 · 31^2 · 977 · [COLOR="Blue"]2588158823...23[/COLOR]<98>[/code]

[quote]Did you hear back from Clavier? If he's ok with it, the numbers could be included in the blue page system.[/quote]

Yes, see post 3473. I PM'd ChristianB who runs the blue page but he hasn't logged onto the forum since April.

richs 2021-06-18 14:37

I agree with charybdis' reasoning. I have had a number of downdriver runs poached in the past, so if one of my reserved numbers gets a downdriver, I hold off posting to factordb.

bur 2021-06-18 16:27

I see, I got your reason for withholding wrong, so you're working on it?


But wouldn't that make some sort of reservation system for these ranges even more important? Worst case someone with a lot of computer power picks up that sequence and overtakes you without any malicious intent.


If the blue page isn't updated, maybe a thread here at MF just for n < 10000? There are a couple ones I thought looked interesting but were in that range.

charybdis 2021-06-18 21:56

[QUOTE=bur;581355]I see, I got your reason for withholding wrong, so you're working on it?


But wouldn't that make some sort of reservation system for these ranges even more important? Worst case someone with a lot of computer power picks up that sequence and overtakes you without any malicious intent.


If the blue page isn't updated, maybe a thread here at MF just for n < 10000? There are a couple ones I thought looked interesting but were in that range.[/QUOTE]

Yes, I'm still working on it, but I won't be updating factordb at least until it gets back to 150 digits with a driver.

Now that Clavier is no longer keeping track of this range I don't see any reason for these sequences to be treated any differently from those above 10000. Ideally ChristianB reads his PMs and changes the blue page so that it accepts reservations below 10000 from this thread. If anyone has an email address for him please do let me know.

Drdmitry 2021-06-19 01:52

Drop 740670

bur 2021-06-19 05:59

[QUOTE]Yes, I'm still working on it, but I won't be updating factordb at least until it gets back to 150 digits with a driver.[/QUOTE]Yes, I got why you do it now, I hope most of the poaching is unintentional though - like mine.



So a blue page update surely would be ideal, but if that doesn't happen it would be good to have a reservation system for that range.

unconnected 2021-06-20 06:19

Drop 2692824

fivemack 2021-06-23 09:43

Take 1061748 1193460 2627844 2657424 2671548 2691360 2716542 2852412 2918496

fivemack 2021-06-23 11:26

Drop 2327016


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