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Old 2010-01-03, 08:28   #12
10metreh
 
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Quote:
Originally Posted by mdettweiler View Post
BTW, anyone know how long it would take to do a PRP test on one of those composites? Maybe we could start a little mini-effort to clean them up.
Alpertron's applet can prove a 1xxx-digit number composite in a few seconds. Although there is a "Set prime" option in the DB (which not everyone has, and which is meant to be used on PRPs but has been maliciously used on composites), there is not a "Set composite" option.

Last fiddled with by 10metreh on 2010-01-03 at 08:29
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Old 2010-01-04, 01:38   #13
mdettweiler
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Quote:
Originally Posted by 10metreh View Post
Alpertron's applet can prove a 1xxx-digit number composite in a few seconds. Although there is a "Set prime" option in the DB (which not everyone has, and which is meant to be used on PRPs but has been maliciously used on composites), there is not a "Set composite" option.
Hmm...if they're that fast, I'm surprised the DB doesn't just test them for primality itself. Syd, if you're reading this, you might want to up the limit for PRP tests a bit.
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Old 2010-01-04, 08:01   #14
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Quote:
Originally Posted by mdettweiler View Post
Hmm...if they're that fast, I'm surprised the DB doesn't just test them for primality itself. Syd, if you're reading this, you might want to up the limit for PRP tests a bit.
But it still takes ages to prove them prime (if they are prime), and above 1000 digits, it does Miller-Rabin instead of APRT-CLE.
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Old 2010-01-04, 08:12   #15
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Quote:
Originally Posted by mdettweiler View Post
Hmm...if they're that fast, I'm surprised the DB doesn't just test them for primality itself. Syd, if you're reading this, you might want to up the limit for PRP tests a bit.
At current time it is useless to queue a number for PRP-test or whatever: there are currently more than 100k numbers in the work queue, increasing by ~25k (sic!) since yesterday. The work queue is frozen (a c213 from 2^773-3 is queued for 5 ECM-curves @ 1e4 since ages), so it will take until the end of time (or till the work queue runs out of disk space)....

(According to Syd's email yesterday, he is currently too busy in RL, so he currently can't repair the work queue.)

Last fiddled with by Andi47 on 2010-01-04 at 08:14
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Old 2010-01-04, 16:39   #16
mdettweiler
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Quote:
Originally Posted by Andi47 View Post
At current time it is useless to queue a number for PRP-test or whatever: there are currently more than 100k numbers in the work queue, increasing by ~25k (sic!) since yesterday. The work queue is frozen (a c213 from 2^773-3 is queued for 5 ECM-curves @ 1e4 since ages), so it will take until the end of time (or till the work queue runs out of disk space)....

(According to Syd's email yesterday, he is currently too busy in RL, so he currently can't repair the work queue.)
What was wrong with the work queue? As I recall, Windows clients produced a lot of bogus work, but Linux worked all right. Why not just open it back up to only Linux clients?
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Old 2010-01-04, 16:45   #17
henryzz
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Quote:
Originally Posted by mdettweiler View Post
What was wrong with the work queue? As I recall, Windows clients produced a lot of bogus work, but Linux worked all right. Why not just open it back up to only Linux clients?
and not all windows clients
plus i think there might have been a corrected script
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Old 2010-03-29, 12:00   #18
ValerieVonck
 
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Apperantely another factor was found

2010-03-14 20:37:14
[XTBA>TSA] IvanleFou
ElevenSmooth 24620+1
(B1 = 43000000) 35777343223943564685838560059604183163850304260261761
53 digits
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Old 2010-12-17, 20:02   #19
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I sincerely suspect that Covering Sets are Titanically useful
in solving this problem.
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Old 2013-05-13, 22:01   #20
pinhodecarlos
 
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[SG-FC] hl found:

2^1575+1
http://factorization.ath.cx/index.php?query=2^1575%2B1
(B1 = 260000000)
P58=4587197577871491467362503750976334015507261591370088644001

Last fiddled with by pinhodecarlos on 2013-05-13 at 22:03
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Old 2013-05-14, 03:27   #21
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Quote:
Originally Posted by pinhodecarlos View Post
[SG-FC] hl found:

2^1575+1
http://factorization.ath.cx/index.php?query=2^1575%2B1
(B1 = 260000000)
P58=4587197577871491467362503750976334015507261591370088644001
Not only that, but it finishes the primitive part of 2^1575+1 as P58 * P160.
Which, unsurprisingly, finishes the entire 2^1575+1.
Which finishes the entire 2^3150-1.
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