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Old 2011-12-20, 08:56   #1
firejuggler
 
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Default strange thing happening in factordb

ok, it seems that someone is feeding factodb with tens of thousands 41 digit long composite... a faw hours ago, it got from 15 000 41-digits number, down to 0 and now there is about 30k new 41-digits composite... Syd, please stop this.. i'm using the yafu script to help diminish that number, but that won't be enough.
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Old 2011-12-20, 09:25   #2
LaurV
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I saw that too, methinks that is an error somewhere in the elves, all these numbers are of the same form and when click on "more info" they all show as factors of 217104448554459483532131214896581817097980524333470831788895962466810110829472107
which is in fact = 3331 · 4746402517<10> · 931955472496582424848090961<27> · 14734464651098101010101014734464646510981<41>

All the numbers of 41 digits that appear there are just running odd numbers (all of them, consecutive) from the C41 above, onwards. Smells fishy.

edit: they are down to 13k from 22k "pieces" in the last 10 minutes. I put my "yoyo" on them too, so they will be gone in 10-15 minutes.

Last fiddled with by LaurV on 2011-12-20 at 09:31
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Old 2011-12-20, 09:33   #3
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While the p10 and p27 look reasonably natural, the p41 is quite obviously artificial. Very suspicious.
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Old 2011-12-20, 09:55   #4
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Look here and here and you see what's (who's) going on there. It's not the first time.
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Old 2011-12-20, 09:57   #5
LaurV
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4800 left, I stopped my "yoyo". Anyhow, the server was handling them much faster then it could transfer them to me, I did about 100 and most of them ended up as "factors already known", so it was futile.

I wish we could get rid of C100 and higher, at this speed...

edit:
Now, I take this opportunity to remind Syd about displaying the last two digits of numbers with more then 50 digits... If he ever read this post of mine, that update would be very-very-very useful for aliquots. Pretty-pretty-please!

2800 left

Last fiddled with by LaurV on 2011-12-20 at 09:59
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Old 2011-12-20, 10:16   #6
LaurV
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Quote:
Originally Posted by kar_bon View Post
Look here and here and you see what's (who's) going on there. It's not the first time.
Idiot! Now he started with 40 digits. Can anyone block his IP? Or better would be implementation of the "user accounts" part, which seems to be an orphan on the page, and only allow registered users to create ID's? We would have nothing to lose... A reasonable policy could then be enforced on user accounts. Anyhow there is only a small bunch of people which are serious about this activity and report most of the factors... the DB will lose nothing by forbidding anonymous reports.

edit: always 50000 numbers, now already down to 45k, he has a script for it.

Last fiddled with by LaurV on 2011-12-20 at 10:23
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Old 2011-12-20, 10:29   #7
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Quote:
Originally Posted by LaurV View Post
edit: always 50000 numbers, now already down to 45k, he has a script for it.
Only Syd can block the IP.

The two posts I gave were originally in the PARI's commands. thread so uses that perhaps (see also some posts above those two).
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Old 2011-12-20, 11:55   #8
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Looking here he's doing it like this:

1111111111111111111111111111110000000731*(1111111111111111111111111111110000000731+k) for odd k-values

In the next pages, all numbers are factored (79 digits).
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Old 2011-12-20, 14:00   #9
em99010pepe
 
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Is it down?
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Old 2011-12-20, 15:18   #10
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Still down.
"Down for ~2 hours (full backup, optimizing tables, ...)"
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Old 2011-12-20, 19:01   #11
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It's back up, but there is a problem:

http://www.factordb.com/sequences.ph...20&fr=0&to=100

Why aren't the primes <300 digits being proven? Usually they go from PRP to P in a matter of seconds. Also, Why aren't there any workers?

http://www.factordb.com/status.php

Oh my! The problem is worse than I thought:

http://www.factordb.com/listtype.php...e=1000&start=0

Why haven't these been proven yet?

Last fiddled with by Stargate38 on 2011-12-20 at 19:07
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