20210314, 17:01  #463 
Sep 2009
2092_{10} Posts 
I've not had any problems. And I'm running a script to add algebraic factors to numbers in factordb so I've been doing about 1 access per second so would notice any outage.
Chris 
20210414, 06:34  #464 
Aug 2020
2^{2}·3·5^{2} Posts 
I saw this already mentioned in another thread, numbers of the form k*2^n+1 are called Cullen numbers in the "More information  Listed as or is factor of listed special form" tab on factordb.
Example: 2^700*3+1 (click on more information) The respective 1 form has  none  in that field. I tried for a while to transform 3*2^700+1 to Cullen form, but got stuck at 48 * 256^87 + 1 ;) 
20210414, 07:36  #465  
"Alexander"
Nov 2008
The Alamo City
2×349 Posts 
Quote:


20210514, 15:57  #466 
Aug 2020
2^{2}×3×5^{2} Posts 
Yep, Proth is altogether missing from factordb, these numbers are consistently called Cullen at the site. It would probably be sufficient to exchange one string for the other.

20210528, 10:41  #467 
"Alexander"
Nov 2008
The Alamo City
2×349 Posts 
Somebody is spamming FactorDB by adding a bunch of random smallish numbers, differing by appending digits. Keep an eye out.

20210529, 04:47  #468 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
2911_{10} Posts 
(9^4451+7^4451)/16 has been certificated to be prime (there is a certificate for this number in factordb), but the status of this number in factordb is still "PRP", not "P"

20210601, 10:00  #469 
"Alexander"
Nov 2008
The Alamo City
2×349 Posts 
The recent crop of "unconfirmed" numbers is mostly made up of products of numbers of special forms (i.e. they have simple algebraic factors), but FactorDB is not just simply applying them. In fact, on some numbers that have too many factors to submit in one request (which is a problem in and of itself; who's submitting these massive products?), it's refused my repeated attempts to divide by some of the algebraic factors in favor of a "piecebypiece" automated approach of picking off smaller factors. Sometimes, dividing by a different set of algebraic factors seems to undo the previous division, leaving me with a larger cofactor. It's very frustrating. Please make FactorDB attempt dividing by algebraic factors immediately upon discovering them.

20210610, 14:38  #470 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
5537_{8} Posts 
The link http://factordb.com/help.php?page=1 is broken.

20210613, 16:58  #471 
Apr 2010
Over the rainbow
2×1,303 Posts 
atm, a lot of composite below 70digits (40 000 atm) have been posted on the db.
I use this simple script from long ago to grab composite, factor them then sending them back to the db. This is a perl/python script that require Last fiddled with by firejuggler on 20210613 at 17:59 
20210731, 04:16  #472 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
41×71 Posts 
The number 650^498101*4/5^996202 cannot be factored, when I report factor either 2 or 13, factordb gets oo loop
Last fiddled with by sweety439 on 20210731 at 04:56 
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