Other Factordb Problems - Page 16

cmd · 2017-03-14, 17:37

Quote:

Originally Posted by GeoffreyY

factordb still thinks that these two are 82 digit composites:
9699691 (id 1100000000912669113)
223092871 (id 1100000000912669114)

Incorrect use of ##

1+8##
1+9##

Stargate38 · 2017-03-17, 22:25

Why does the DB say that this number is 2*3²⁴*19¹⁸*363889*109912203092239643840221 instead of 2*3¹⁸*19¹⁸*363889*109912203092239643840221? I checked in Pari/gp, and it says this:

Code:

(18:11) gp > factor(3226950014783883023598007090793710151258504258637092076077562)
%1 =
[                       2  1]

[                       3 18]

[                      19 18]

[                  363889  1]

[109912203092239643840221  1]

(18:11) gp > 2*3^18*19^18*363889*109912203092239643840221
%2 = 3226950014783883023598007090793710151258504258637092076077562
(18:17) gp >

Somehow, the db messed up on the power of 3, and reports the factorization of this number instead.

VolMike · 2017-03-18, 08:48

Hi all.
There is a problem with http://www.factordb.com/index.php?id...00000900935563.
It's proven prime, but it's still shown as composite at http://www.factordb.com/listtype.php?t=3, which gives some inconveniencies during automatic factorization.
I hope the factordb's admins can manually set this number prime.

Stargate38 · 2017-03-19, 19:14

I'm also having problems with 2*3¹⁴*19¹⁸*363889*109912203092239643840221, 2*3¹⁶*19¹⁸*363889*109912203092239643840221, and 2*3¹⁹*19¹⁸*363889*109912203092239643840221. They also have the wrong factorization.

cmd · 2017-03-26, 21:56

id rec error (dupe?)

cmd · 2017-03-27, 00:28

a|\|°t|-|er .. |-|°|_e

chris2be8 · 2017-04-02, 15:32

I've just sent Marcus an email listing the various problems I can see in factordb (the ones on the first page of composite numbers and the composite in the list of PRPs). I'll let you know if he replies with anything interesting.

Chris

chris2be8 · 2017-04-11, 16:01

I've had a reply from Markus saying he has very little time at the moment, but will look at it soon.

Chris

chris2be8 · 2017-07-20, 15:43

Two more problems:

The distribution of probable primes shows one of 22 digits. But the list of probable primes at http://factordb.com/listtype.php?t=1 doesn't show anything (unless you set min digits to something larger than 22). This is probably why the status page doesn't show the smallest PRP now.

The list of composite numbers at http://factordb.com/listtype.php?t=3 has a similar issues at 22 and 30 digits (and possibly some more between those ranges).

Chris

cubaq · 2017-08-04, 16:52

I am reporting factor to composite.
Factor is known from 2014, but 'source' number is still marked as 'C'.
After reporting factor db shows attached screen.

Regards, cubaq

Stargate38 · 2017-08-04, 22:05

What's going on here?!

http://www.factordb.com/index.php?qu...at=1&sent=Show

x=14, 16, 18, and 19 are showing the wrong factorizations. It's the same problem that's going on here. Please fix it! It's been like that since St. Patrick's Day, and it's getting to be really annoying! Also the DB workers are stuck on 743 numbers <1 quintillion that just won't go from C to FF, even though all the factors are already there, resulting in larger composites not getting factored.

2017-03-17, 22:25	#167
Stargate38 "Daniel Jackson" May 2011 14285714285714285714 3×13×17 Posts	Why am I getting the factorization of a 64-digit number instead of a 61-digit number? Why does the DB say that this number is 23²⁴19¹⁸363889109912203092239643840221 instead of 23¹⁸19¹⁸363889109912203092239643840221? I checked in Pari/gp, and it says this: Code: (18:11) gp > factor(3226950014783883023598007090793710151258504258637092076077562) %1 = [ 2 1] [ 3 18] [ 19 18] [ 363889 1] [109912203092239643840221 1] (18:11) gp > 23^1819^18363889109912203092239643840221 %2 = 3226950014783883023598007090793710151258504258637092076077562 (18:17) gp > Somehow, the db messed up on the power of 3, and reports the factorization of this number instead. Last fiddled with by Stargate38 on 2017-03-17 at 22:26 Reason: 109912203092239643840221 instead of (19^19-1)/18 for clarity...

2017-03-18, 08:48	#168
VolMike Jun 2007 Moscow,Russia 205₈ Posts	Problem with (10^79-181)%(10^79-1)/9 Hi all. There is a problem with http://www.factordb.com/index.php?id...00000900935563. It's proven prime, but it's still shown as composite at http://www.factordb.com/listtype.php?t=3, which gives some inconveniencies during automatic factorization. I hope the factordb's admins can manually set this number prime. Last fiddled with by VolMike on 2017-03-18 at 08:50

2017-03-19, 19:14	#169
Stargate38 "Daniel Jackson" May 2011 14285714285714285714 3×13×17 Posts	I'm also having problems with 23¹⁴19¹⁸363889109912203092239643840221, 23¹⁶19¹⁸363889109912203092239643840221, and 23¹⁹19¹⁸363889109912203092239643840221. They also have the wrong factorization. Last fiddled with by Stargate38 on 2017-03-19 at 19:16 Reason: fix formatting...

2017-03-26, 21:56	#170
cmd "(^r'°:.:)^n;e'e" Nov 2008 ;t:.:;^ 3³×37 Posts	# id rec error (dupe?) Attached Thumbnails

2017-03-27, 00:28	#171
cmd "(^r'°:.:)^n;e'e" Nov 2008 ;t:.:;^ 3³×37 Posts	# a\|\\|°t\|-\|er .. \|-\|°\|_e Attached Thumbnails

2017-04-02, 15:32	#172
chris2be8 Sep 2009 2×1,039 Posts	I've just sent Marcus an email listing the various problems I can see in factordb (the ones on the first page of composite numbers and the composite in the list of PRPs). I'll let you know if he replies with anything interesting. Chris

2017-04-11, 16:01	#173
chris2be8 Sep 2009 100000011110₂ Posts	I've had a reply from Markus saying he has very little time at the moment, but will look at it soon. Chris

2017-07-20, 15:43	#174
chris2be8 Sep 2009 2·1,039 Posts	Two more problems: The distribution of probable primes shows one of 22 digits. But the list of probable primes at http://factordb.com/listtype.php?t=1 doesn't show anything (unless you set min digits to something larger than 22). This is probably why the status page doesn't show the smallest PRP now. The list of composite numbers at http://factordb.com/listtype.php?t=3 has a similar issues at 22 and 30 digits (and possibly some more between those ranges). Chris

2017-08-04, 16:52	#175
cubaq Mar 2016 3C₁₆ Posts	reporting factors problem I am reporting factor to composite. Factor is known from 2014, but 'source' number is still marked as 'C'. After reporting factor db shows attached screen. Regards, cubaq Attached Thumbnails

2017-08-04, 22:05	#176
Stargate38 "Daniel Jackson" May 2011 14285714285714285714 3·13·17 Posts	What on Earth is wrong with these number entries?! What's going on here?! http://www.factordb.com/index.php?qu...at=1&sent=Show x=14, 16, 18, and 19 are showing the wrong factorizations. It's the same problem that's going on here. Please fix it! It's been like that since St. Patrick's Day, and it's getting to be really annoying! Also the DB workers are stuck on 743 numbers <1 quintillion that just won't go from C to FF, even though all the factors are already there, resulting in larger composites not getting factored. Last fiddled with by Stargate38 on 2017-08-04 at 22:12 Reason: more info

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