Factoring database - Page 136

Puzzle-Peter · 2013-03-30, 07:11

Is there any way to import sr(x)sieve output? Is this even desired? From my work at CRUS I have many lines that look like

Code:

10015783365641 | 404*23^882592-1
10022393651131 | 404*23^838048-1
10041085361579 | 404*23^885872-1
10087402684339 | 404*23^920216-1
10219806779753 | 404*23^732424-1
10231177241561 | 404*23^929264-1

meaning 10015783365641divides 404*23^882592-1 etc.
Copy-pasting in the "Report factors" box does not work

kar_bon · 2013-03-30, 09:03

Quote:

Originally Posted by Puzzle-Peter

Is there any way to import sr(x)sieve output? Is this even desired?

FactorDB was designed to store factors and primes up to 100k digits and that's really high enough. Factors like those from sieving results would blast the database.

Puzzle-Peter · 2013-03-30, 16:20

Quote:

Originally Posted by kar_bon

FactorDB was designed to store factors and primes up to 100k digits and that's really high enough. Factors like those from sieving results would blast the database.

I see. Thanks for the information.

Jayder · 2013-04-03, 07:05

As I type this, dozens of multiples of the P35: 88999999999999999999999999999999999 are being dumped into the database. I have factored a good 120 or more where this is a factor, and there are no signs of it letting up. I have since stopped factoring.

Maybe I shouldn't worry about this, but thought I would mention it as it seemed peculiar. Tell me not to worry about it and I won't.

ChristianB · 2013-04-04, 10:51

Hello fellow factorisers,

some time ago (approx. 2 weeks), when I started to get interested in factordb, I also saw this specific P35 in a lot of small composites. I think someone is trying to find a fancy sequence.

I'm tackling the small composites from 70 to 85 digits with yoyo's script from time to time. I also try to clear the small PRP's (300 to 999 digits) that accumulated every 2 or 3 days.

kar_bon · 2013-04-05, 09:28

Someone is flodding the FactorDB with 99 digit numbers which all contain the factor 17775554443332221112223334445557770123456789557977

like 17775554443332221112223334445557770123456789564501 * 17775554443332221112223334445557770123456789557977.

cmd-type typical, factor those numbers by yourself! It's annoying!

Jayder · 2013-04-05, 10:41

I'm not very knowledgeable, but surely they HAVE to know that these are the factors, right? You don't just accidentally or coincidentally submit hundreds of numbers with the same factor. Do you?

Is somebody doing this maliciously?

debrouxl · 2013-04-05, 10:51

Yes, every now and then, some people are submitting entries of no interest to FactorDB, and this behaviour is probably more than severe incompetence - maliciousness, you named it.

BigBrother · 2013-04-05, 12:58

Isn't it possible to ban the IPs of these idiots?

debrouxl · 2013-04-05, 14:47

It is possible, but bans based on IP addresses are easy to work around...

cmd · 2013-04-05, 17:14

Quote:

Originally Posted by kar_bon

Someone is flodding the FactorDB with 99 digit numbers which all contain the factor 17775554443332221112223334445557770123456789557977

like 17775554443332221112223334445557770123456789564501 * 17775554443332221112223334445557770123456789557977.

cmd-type typical, factor those numbers by yourself! It's annoying!

17775554443332221112223334445557770123456789557977

T\/\/;n 17775554443332221112223334445557770123456789557979

2013-03-30, 07:11	#1486
Puzzle-Peter Jun 2009 2²·3²·19 Posts	Is there any way to import sr(x)sieve output? Is this even desired? From my work at CRUS I have many lines that look like Code: 10015783365641 \| 40423^882592-1 10022393651131 \| 40423^838048-1 10041085361579 \| 40423^885872-1 10087402684339 \| 40423^920216-1 10219806779753 \| 40423^732424-1 10231177241561 \| 40423^929264-1 meaning 10015783365641divides 40423^882592-1 etc. Copy-pasting in the "Report factors" box does not work Last fiddled with by Puzzle-Peter on 2013-03-30 at 07:11*

2013-04-03, 07:05	#1489
Jayder Dec 2012 2·139 Posts	As I type this, dozens of multiples of the P35: 88999999999999999999999999999999999 are being dumped into the database. I have factored a good 120 or more where this is a factor, and there are no signs of it letting up. I have since stopped factoring. Maybe I shouldn't worry about this, but thought I would mention it as it seemed peculiar. Tell me not to worry about it and I won't. Last fiddled with by Jayder on 2013-04-03 at 07:20

2013-04-05, 09:28	#1491
kar_bon Mar 2006 Germany 2³·3·11² Posts	Someone is flodding the FactorDB with 99 digit numbers which all contain the factor 17775554443332221112223334445557770123456789557977 like 17775554443332221112223334445557770123456789564501 * 17775554443332221112223334445557770123456789557977. cmd-type typical, factor those numbers by yourself! It's annoying! Last fiddled with by kar_bon on 2013-04-05 at 09:33

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2013-04-04, 10:51	#1490
ChristianB Apr 2013 Germany 467₈ Posts	Hello fellow factorisers, some time ago (approx. 2 weeks), when I started to get interested in factordb, I also saw this specific P35 in a lot of small composites. I think someone is trying to find a fancy sequence. I'm tackling the small composites from 70 to 85 digits with yoyo's script from time to time. I also try to clear the small PRP's (300 to 999 digits) that accumulated every 2 or 3 days.

2013-04-05, 10:41	#1492
Jayder Dec 2012 2·139 Posts	I'm not very knowledgeable, but surely they HAVE to know that these are the factors, right? You don't just accidentally or coincidentally submit hundreds of numbers with the same factor. Do you? Is somebody doing this maliciously?

2013-04-05, 10:51	#1493
debrouxl Sep 2009 977 Posts	Yes, every now and then, some people are submitting entries of no interest to FactorDB, and this behaviour is probably more than severe incompetence - maliciousness, you named it.

2013-04-05, 12:58	#1494
BigBrother Feb 2005 The Netherlands DA₁₆ Posts	Isn't it possible to ban the IPs of these idiots?

2013-04-05, 14:47	#1495
debrouxl Sep 2009 977 Posts	It is possible, but bans based on IP addresses are easy to work around...