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Old 2021-10-25, 04:39   #474
firejuggler
 
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"Vincent"
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It seems that the db is filled with approximatelly 5000+ low integer that are less than 5 digits and are all in the form of

Code:
64^63%(2^63-1)*x
Those need to be purged.

Last fiddled with by firejuggler on 2021-10-25 at 04:45
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Old 2021-10-28, 07:28   #475
Happy5214
 
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Quote:
Originally Posted by firejuggler View Post
It seems that the db is filled with approximatelly 5000+ low integer that are less than 5 digits and are all in the form of

Code:
64^63%(2^63-1)*x
Those need to be purged.
The modulo operator (%) needs to be removed entirely if we keep getting issues like this. The software is able to resolve the operation, but it can't seem to figure out that it doesn't need a new ID just because that operator is in the form. Normally, distinct forms don't result in duplicate IDs for numbers already in the database, but they do for anything with %.
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Old 2021-10-28, 12:47   #476
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Quote:
Originally Posted by Happy5214 View Post
The modulo operator (%) needs to be removed entirely if we keep getting issues like this. The software is able to resolve the operation, but it can't seem to figure out that it doesn't need a new ID just because that operator is in the form. Normally, distinct forms don't result in duplicate IDs for numbers already in the database, but they do for anything with %.
Probably there are two (or more) different code paths which parses/checks/creates, and they're using different precedence for the % operator. Could be becuase it is using a different program for some of the computation (similar to ## issue where PFGW interprets it differently from factordb internal operations)

Anyway, maybe someone can email Syd to get these fixed.
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Old 2021-11-02, 10:32   #477
firejuggler
 
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another false-positive or a positive-false i'm afraid
http://factordb.com/index.php?id=1100000000938546746
Code:
(10^43*10-10^43-1)^2-2
P88 = 8099999999999999999999999999999999999999999819999999999999999999999999999999999999999999
is seen as composite when yafu tell me is is a p88
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Old 2021-11-02, 12:33   #478
sweety439
 
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Quote:
Originally Posted by firejuggler View Post
another false-positive or a positive-false i'm afraid
http://factordb.com/index.php?id=1100000000938546746
Code:
(10^43*10-10^43-1)^2-2
P88 = 8099999999999999999999999999999999999999999819999999999999999999999999999999999999999999
is seen as composite when yafu tell me is is a p88
Well.... the same number http://factordb.com/index.php?id=1100000000938611710
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Old 2021-11-07, 10:10   #479
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Quote:
Originally Posted by sweety439 View Post
So (10^43*10-10^43-1)^2-2 ≠ (10^43*9-1)^2-2?

Wow, this backend needs a better algebra system.
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Old 2021-12-29, 14:22   #480
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Overnight some nitwit added 8 C89's and 1 C90 of the form 2^572%2^286*286 that the database does not parse correctly as noted earlier in this thread.
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Old 2022-01-21, 19:21   #481
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Does anyone know if Syd is still reading this thread? In the factor tables there's the wrong entry for Proth numbers (called Cullen there) and the Sylvester/Euclid sequence could be fixed so it won't terminate at primes.


On the other hand, is there a specific reason that that sequence is in the db and won't add new terms until the last one is factored? It doesn't require factorization to calculate the next term.
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Old 2022-01-21, 19:40   #482
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I don't think he is routinely keeping up with the forum threads. In the past, when I've contacted him, I used the email at the bottom of the "imprint" page. He's always been quite responsive to db issues, when contacted.
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Old 2022-01-25, 15:51   #483
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I've noticed that the DB has been running slow. Is someone flooding it, or is there a hardware issue?
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Old 2022-02-04, 00:16   #484
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Quote:
Originally Posted by Stargate38 View Post
I've noticed that the DB has been running slow. Is someone flooding it, or is there a hardware issue?
I don't know if this is the same issue that you were having, but the DB is being flooded. Someone is adding millions of 4x-digit numbers, many of the form 10^46+n, along with their factorizations, and there is now a backlog of millions of unproved small PRPs which is preventing other PRPs from being proved. I've dropped Markus an email. If the user responsible happens to be reading this forum, please could you stop?
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