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Old 2010-02-25, 01:08   #1
Buckle
 
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Hobart, Australia

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Default 646730219521 Divides F19

This is a smaller factor than I would have anticipated.

646 Billion 730 Million 219 Thousand 521


ECM found a factor in curve #1, stage #1
Sigma=3460786319450698, B1=3000000, B2=300000000.
UID: Buckle/G801, F19 has a factor: 646730219521, AID: A5CC03C1F2227056DE35CDEAC3E17011

David Bessell
(No relation to Uncle Friedrich)

Last fiddled with by Buckle on 2010-02-25 at 02:08
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Old 2010-02-25, 01:25   #2
rogue
 
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Quote:
Originally Posted by Buckle View Post
This is a smaller factor than I would have anticipated.

ECM found a factor in curve #1, stage #1
Sigma=3460786319450698, B1=3000000, B2=300000000.
UID: Buckle/G801, F19 has a factor: 646730219521, AID: A5CC03C1F2227056DE35CDEAC3E17011
This is a known factor equivalent to 308385*2^21+1.
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Old 2010-02-25, 02:12   #3
Buckle
 
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Default Ooops

sorry
typo in the "work to do" file

Last fiddled with by Buckle on 2010-02-25 at 02:12
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Old 2010-02-25, 04:08   #4
rogue
 
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Quote:
Originally Posted by Buckle View Post
sorry
typo in the "work to do" file
Keep at it. You might get lucky...
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Old 2010-02-25, 10:29   #5
ET_
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Quote:
Originally Posted by rogue View Post
This is a known factor equivalent to 308385*2^21+1.
Maybe a lowp.txt file not updated?

Luigi
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Old 2010-03-27, 01:08   #6
bdodson
 
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Quote:
Originally Posted by rogue View Post
Keep at it. You might get lucky...
Nice suggestion! The F22 factor is p35? Also GIMPS ecm, as above? -Bruce

(no google hits for the factor, not even the forum post.)

update:
Code:
     1 Buckle                  15540.872     7626         2 |                        
     2 James Hintz              2529.371     2881         0 |                        
     3 eteo                     2259.553       67         0 |                        
     4 Tapio Rajala             2125.422      770         1 |   1
is the GIMPS listing for ECM on Fermat numbers. I also got what
appeared to be a law firm listing in .au, for what it's worth.

Last fiddled with by bdodson on 2010-03-27 at 01:19
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Old 2010-03-28, 02:21   #7
ixfd64
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Quote:
Originally Posted by rogue View Post
Keep at it. You might get lucky...
It looks like he did.
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Old 2010-03-29, 22:56   #8
Buckle
 
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Quote:
Originally Posted by bdodson View Post
Nice suggestion! The F22 factor is p35? Also GIMPS ecm, as above? -Bruce

(no google hits for the factor, not even the forum post.)

update:
Code:
     1 Buckle                  15540.872     7626         2 |                        
     2 James Hintz              2529.371     2881         0 |                        
     3 eteo                     2259.553       67         0 |                        
     4 Tapio Rajala             2125.422      770         1 |   1
is the GIMPS listing for ECM on Fermat numbers. I also got what
appeared to be a law firm listing in .au, for what it's worth.

The law firm is Page Seager and another David Bessell works there. Coincidentally PS is situated about 200 metres down the road from St Michael's Collegiate where I work.
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