GIMPS' first Fermat factor! - Page 2

TimSorbet · 2009-07-18, 01:48

Quote:

Originally Posted by akruppa

When I run the test with the new factor omitted, I get RES: AD48BE5F089980AC. Does not match Mini-Geek's, either. Strange.

Alex

I see no reason why it should. I never ran a test on F19/old_factors. The only time I'd expect to see that particular result again is if you stopped F19 and switched to F19/known_factors (including the new one) at the exact same iteration that I did. I don't know the iteration that I switched over, only that it was in the 330,000 range.

Prime95 · 2009-07-18, 02:00

Quote:

Originally Posted by Mini-Geek

Are the save files between F19 and F19/known_factors incompatible? It was used automatically. If they're not compatible and that's the cause of the difference, George ought to fix that

Find a new Fermat factor and my reward is .... a bug report

frmky · 2009-07-18, 02:15

PFGW agrees with Alex and jrk's runs. Ignore the first digit of the residue as usual with PFGW.

Code:

PFGW Version 20090706.Win_Dev (Beta 'caveat utilitor') [GWNUM 25.11]

PRP: Phi(2^20,2)/(705....524446080499713) 524097/524097 mro=0.03125 sum=1703.34/
Phi(2^20,2)/(70525124609*646730219521*37590055514133754286524446080499713) is composite: RES64: [061CCF4C8ABEF914] (1599.8707s+0.0889s)

Andi47 · 2009-07-18, 05:38

Quote:

Originally Posted by Prime95

User Buckle turned in this gem recently!

F19 has a factor: 37590055514133754286524446080499713

Anyone want to test if this completes the factorization of F19?

XYYXF · 2009-07-18, 06:08

A nice one :-)

How about F14? It has no known factors still, but according to
http://www.fermatsearch.org/stats/ecm_f.php
some ECM curves with B1 = 43M or 110M may solve the problem :-)

10metreh · 2009-07-18, 07:42

Can someone have a go with PFGW?

henryzz · 2009-07-18, 08:15

Quote:

Originally Posted by 10metreh

Can someone have a go with PFGW?

check post #14

10metreh · 2009-07-18, 08:57

Quote:

Originally Posted by henryzz

check post #14

Oh, silly me.

ET_ · 2009-07-18, 10:54

George, do you think possible to know the full name of the user Buckle, to update the list of Fermat factors discoverers?

Luigi

MatWur-S530113 · 2009-07-18, 13:21

Congratulations to Buckle and GIMPS.
One day we will have found more factors of Fermatnumbers than we found Mersenneprimes

Matthias

ET_ · 2009-07-18, 13:42

Quote:

Originally Posted by MatWur-S530113

Congratulations to Buckle and GIMPS.
One day we will have found more factors of Fermatnumbers than we found Mersenneprimes

Matthias

PFGW with GWNUM 25.11 is already in use to test Fermat factors

Apart from that, I guess that finding factors with ECM is a bit slow-pacing, due to the big numbers involved and the popularity of the task.

Sure enough, there will be a boost in ECM-F after this discovery!

Luigi

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2009-07-18, 06:08	#16
XYYXF Jan 2005 Minsk, Belarus 2⁴·5² Posts	A nice one :-) How about F14? It has no known factors still, but according to http://www.fermatsearch.org/stats/ecm_f.php some ECM curves with B1 = 43M or 110M may solve the problem :-)

2009-07-18, 07:42	#17
10metreh Nov 2008 2·3³·43 Posts	Can someone have a go with PFGW?

2009-07-18, 10:54	#20
ET_ Banned "Luigi" Aug 2002 Team Italia 3·1,619 Posts	George, do you think possible to know the full name of the user Buckle, to update the list of Fermat factors discoverers? Luigi

2009-07-18, 13:21	#21
MatWur-S530113 Apr 2007 Spessart/Germany 2·83 Posts	Congratulations to Buckle and GIMPS. One day we will have found more factors of Fermatnumbers than we found Mersenneprimes Matthias