Other Factordb Problems - Page 39

chris2be8 · 2019-09-22, 16:21

The list of composites with no known factors, http://factordb.com/listtype.php?t=3 has problems at 71 and 75 digits. wget gets:

Code:

--2019-09-22 17:17:36--  http://factordb.com/listtype.php?t=3&mindig=70&perpage=1&start=4&download=1
Resolving factordb.com (factordb.com)... 116.203.33.155
Connecting to factordb.com (factordb.com)|116.203.33.155|:80... connected.
HTTP request sent, awaiting response... 500 Internal Server Error
2019-09-22 17:17:37 ERROR 500: Internal Server Error.

Chris

carpetpool · 2019-09-26, 03:56

N-1 Proof test has been delayed for several days (maybe it's a system error?):

http://www.factordb.com/index.php?id...00001362414421

"This number is already in queue for N-1-test."

The large N-1 factor can be found here.

Thanks to who knows what's going on.

BTW, How long would it take to prove a random 20,000 digit prime using N-1? I plan to enter one in the database soon I hope it won't stress out the system any more.

MDaniello · 2019-09-26, 07:24

Quote:

Originally Posted by carpetpool

N-1 Proof test has been delayed for several days (maybe it's a system error?)

I'm looking for easy N-1 proofs these days, and i noticed this too. Maybe is giving priority in checking Primo certificates, if N-1 has a lot factors? Usually i see dozens of certificates in queue. (it's just a guess, i actually don't know how the db handles its queues).

axn · 2019-09-26, 07:37

Quote:

Originally Posted by MDaniello

I'm looking for easy N-1 proofs these days, and i noticed this too. Maybe is giving priority in checking Primo certificates, if N-1 has a lot factors? Usually i see dozens of certificates in queue. (it's just a guess, i actually don't know how the db handles its queues).

The db has a quad core CPU and it is processing 4 certificates at a time, so yes, that's what's holding up the other checks (PRP, N-1, etc.)

pakaran · 2019-11-19, 17:20

A 1344-dd number that I certified Saturday has been stuck verifying for around 48 hours at this point.

chris2be8 · 2019-11-20, 17:19

(4386^689+2067^1462)/3^689/2705 (4515 digits) submitted by Masaki UKAI is also stuck.

And the load average earlier today was less than 1 so it doesn't look as if they are being processed.

Chris

unconnected · 2019-11-29, 06:29

Aliquot sequences are not displaying

firejuggler · 2019-12-06, 18:58

http://factordb.com/index.php?id=1100000000900935563 got a problem.
it is supposed to be prime.

jyb · 2019-12-07, 05:11

Quote:

Originally Posted by firejuggler

http://factordb.com/index.php?id=1100000000900935563 got a problem.
it is supposed to be prime.

Yes, that does seem to be a problem. Interestingly, if one queries the number just using its decimal expansion, then it shows up as prime.

This ID is for the expression (10^79-181)%(10^79-1)/9. Can you explain why such an expression was generated? 10^79-181 is less than 10^79-1, so the % operator doesn't actually do anything here. It's the same number as just (10^79-181)/9. Of course, if you query that expression, it shows up as prime.

firejuggler · 2019-12-07, 07:25

I have no idea. it was the 'smallest composite without a factor' at the time.

RichD · 2019-12-07, 13:54

Quote:

Originally Posted by firejuggler

http://factordb.com/index.php?id=1100000000900935563 got a problem.
it is supposed to be prime.

This is a known problem for nearly three years. See here.

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2019-09-26, 03:56	#420
carpetpool "Sam" Nov 2016 2²×3⁴ Posts	N-1 Proof test has been delayed for several days (maybe it's a system error?): http://www.factordb.com/index.php?id...00001362414421 "This number is already in queue for N-1-test." The large N-1 factor can be found here. Thanks to who knows what's going on. BTW, How long would it take to prove a random 20,000 digit prime using N-1? I plan to enter one in the database soon I hope it won't stress out the system any more.

2019-11-19, 17:20	#423
pakaran Aug 2002 371₈ Posts	A 1344-dd number that I certified Saturday has been stuck verifying for around 48 hours at this point.

2019-11-20, 17:19	#424
chris2be8 Sep 2009 2078₁₀ Posts	(4386^689+2067^1462)/3^689/2705 (4515 digits) submitted by Masaki UKAI is also stuck. And the load average earlier today was less than 1 so it doesn't look as if they are being processed. Chris

2019-11-29, 06:29	#425
unconnected May 2009 Russia, Moscow 13·199 Posts	Aliquot sequences are not displaying

2019-12-06, 18:58	#426
firejuggler Apr 2010 Over the rainbow 2³·5²·13 Posts	http://factordb.com/index.php?id=1100000000900935563 got a problem. it is supposed to be prime.

2019-12-07, 07:25	#428
firejuggler Apr 2010 Over the rainbow 2³·5²·13 Posts	I have no idea. it was the 'smallest composite without a factor' at the time.