Factoring database - Page 132

RichD · 2012-10-22, 03:47

Quote:

Originally Posted by kar_bon

Someone is putting currently a huge mass of 35-digit numbers into the FactorDB, 40000 and increasing fastly!

I saw something similar. After checking the IDs, they all seem to be consecutive skipping the even numbers.

chris2be8 · 2012-11-05, 18:26

Is anything being done about the numbers with status unknown? I've been nibbling at them by looking for numbers with algebraic factors, but that's not practical on a large enough scale to make much difference. (I've found factors for about 2% of numbers.)

Removing the limit on size of numbers with status unknown that factordb checks would be the ideal. Assuming it has the resources available.

Chris

PS. Let me know if you want to know what sort of algebraic factors I can find.

lorgix · 2012-11-15, 12:15

Will the db be able to handle the new ECM parameters used by GMP-ECM?

"-sigma p:s"

firejuggler · 2012-12-07, 20:56

yoohoo! proved
http://factordb.com/index.php?id=110...rime&np1=Proof

N+1= 2^3 * 3^2 * 7 * 29 * 37 · 131 * 593 * 647 * 1009 * 2459 * 5077 * 21283 * 28578203 * 210947323679011902309460897795670017^55

yup a power 55
found 28578203, and factordb found the power 55 by itself

Stargate38 · 2012-12-08, 18:23

It may be cmd again, flooding the db like last time.

kar_bon · 2012-12-08, 22:13

Quote:

Originally Posted by Stargate38

It may be cmd again, flooding the db like last time.

Many of the 'newer' composites (4th Dec. and today) in the C88-C90 range are aliqout members like this it seems.

firejuggler · 2012-12-11, 08:57

Around 20 000 composite below 90 digits... give it a nudge.

kar_bon · 2012-12-11, 09:30

Quote:

Originally Posted by firejuggler

Around 20 000 composite below 90 digits... give it a nudge.

Seems also aliqout-type numbers. So Greebley is searching for all seqs < 10M instead of 5M, now?

wblipp · 2012-12-11, 13:23

Quote:

Originally Posted by kar_bon

Seems also aliqout-type numbers.

How do you tell this?

firejuggler · 2012-12-11, 13:28

I would assume that the 'original' number is even :
http://factordb.com/index.php?id=1100000000560323360
C90=2^3*3 * 11* 31 *P10 *P12 *C65

edit : and someone add ùore and more prime ... a few minutes ago there was 72 000 P95 , now it is at 112 000 prime of 95 digits long

firejuggler · 2012-12-11, 15:16

the person (over) flooding the DB seem to list every prime of 95 digit ... this need to be dealt with.

2012-12-07, 20:56	#1445
firejuggler Apr 2010 Over the rainbow 2×1,303 Posts	yoohoo! proved http://factordb.com/index.php?id=110...rime&np1=Proof N+1= 2^3 * 3^2 * 7 * 29 * 37 · 131 * 593 * 647 * 1009 * 2459 * 5077 * 21283 * 28578203 * 210947323679011902309460897795670017^55 yup a power 55 found 28578203, and factordb found the power 55 by itself Last fiddled with by firejuggler on 2012-12-07 at 20:57

2012-12-11, 13:28	#1451
firejuggler Apr 2010 Over the rainbow 2·1,303 Posts	I would assume that the 'original' number is even : http://factordb.com/index.php?id=1100000000560323360 C90=2^33 11* 31 P10 P12 C65 edit : and someone add ùore and more prime ... a few minutes ago there was 72 000 P95 , now it is at 112 000 prime of 95 digits long Last fiddled with by firejuggler on 2012-12-11 at 13:51*

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2012-11-05, 18:26	#1443
chris2be8 Sep 2009 2²·523 Posts	Is anything being done about the numbers with status unknown? I've been nibbling at them by looking for numbers with algebraic factors, but that's not practical on a large enough scale to make much difference. (I've found factors for about 2% of numbers.) Removing the limit on size of numbers with status unknown that factordb checks would be the ideal. Assuming it has the resources available. Chris PS. Let me know if you want to know what sort of algebraic factors I can find.

2012-11-15, 12:15	#1444
lorgix Sep 2010 Scandinavia 3×5×41 Posts	Will the db be able to handle the new ECM parameters used by GMP-ECM? "-sigma p:s"

2012-12-08, 18:23	#1446
Stargate38 "Daniel Jackson" May 2011 14285714285714285714 2³·83 Posts	It may be cmd again, flooding the db like last time.

2012-12-11, 08:57	#1448
firejuggler Apr 2010 Over the rainbow 2×1,303 Posts	Around 20 000 composite below 90 digits... give it a nudge.

2012-12-11, 15:16	#1452
firejuggler Apr 2010 Over the rainbow 2·1,303 Posts	the person (over) flooding the DB seem to list every prime of 95 digit ... this need to be dealt with.