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Old 2005-12-28, 07:07   #1
em99010pepe
 
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Default Found something here

A factor was found for 3037_73M.C251 using GMP-ECM using factor method ECM
Candidate number: 544713379582040389926882455038 51182120843617942033826720978156865956893140612939928579441838806971624415850520171245804056141567802318034050852879824009067809418896523589524538881682631488528799177522680274414145034524836746236986253623331102234685561
Factor: 89967105661394634963947134669
Factor Type: probable
Co-Factor: 605458379012608168505378881528807004355481347052195502602875639159909481485241046497849947638983276547821427620623094550779954365111663174767236489888030484459390772067856344268616228400139113458872266226098496244818968669
Co-Factor Type: Probable
B1: 1000000
Sigma: 1734120809
Finder: myemailaddress
Found on machine: 1
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Old 2005-12-28, 07:41   #2
Citrix
 
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Congrats, Carlos!
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Old 2005-12-28, 09:48   #3
em99010pepe
 
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Thanks Citrix.
Double check needed.


Factors.log content:

[2005-12-28 02:40:28 GMT] a: Factor found! 3037_73M.C251 / (probable) 89967105661394634963947134669 B1: 1000000 sigma: 1734120809 (found in step 1)
[2005-12-28 02:40:28 GMT] a: Co-factor: 3037_73M.C251 / (Probable) 605458379012608168505378881528807004355481347052195502602875639159909481485241046497849947638983276547821427620623094550779954365111663174767236489888030484459390772067856344268616228400139113458872266226098496244818968669


Carlos

Last fiddled with by em99010pepe on 2005-12-28 at 09:54
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Old 2005-12-28, 11:28   #4
ValerieVonck
 
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The doublecheck is running:

Parameters:

Code:
ecm -sigma 1734120809  -v 1000000 544713379582040389926882455038 51182120843617942033826720978156865956893140612939928579441838806971624415850520171245804056141567802318034050852879824009067809418896523589524538881682631488528799177522680274414145034524836746236986253623331102234685561
Regards
C.

Using gmp-ecm 6.0.1 powered by gmp 4.1.4
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Old 2005-12-28, 11:52   #5
xilman
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Quote:
Originally Posted by CedricVonck
The doublecheck is running:

Parameters:

Code:
ecm -sigma 1734120809  -v 1000000 544713379582040389926882455038 51182120843617942033826720978156865956893140612939928579441838806971624415850520171245804056141567802318034050852879824009067809418896523589524538881682631488528799177522680274414145034524836746236986253623331102234685561
Regards
C.

Using gmp-ecm 6.0.1 powered by gmp 4.1.4


Why on earth are you spending vast amounts of computation re-running an ECM factorization? Why don't you just take the purported factors, multiply them together, and see if the result is equal to the number you were trying to factor?

Bizarre. I must be missing something.

Paul
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Old 2005-12-28, 12:26   #6
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sorry xilman I am not as smart as you therefore quitting the check

Last fiddled with by ValerieVonck on 2005-12-28 at 12:26
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Old 2005-12-28, 13:42   #7
fetofs
 
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Quote:
Originally Posted by xilman


Why on earth are you spending vast amounts of computation re-running an ECM factorization? Why don't you just take the purported factors, multiply them together, and see if the result is equal to the number you were trying to factor?

Bizarre. I must be missing something.

Paul
BTW, unless my computer is wrong, it is.

EDIT: And the cofactor is a prime.

Last fiddled with by fetofs on 2005-12-28 at 13:52
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Old 2006-01-02, 02:25   #8
wblipp
 
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This factor comes from the OddPerfect More Wanted ecm server at oddperfect.no-ip.com:8202. Although not immediately on a critical path, no factors were previously known for this number, so this clears a potential future roadblock. This confirms that your curves and your factors are coming through. This also fits within Brent's factor tables, and will be reported to him with the next batch of factors from OddPerfect.org. Thanks, Carlos.
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Old 2006-01-02, 10:12   #9
em99010pepe
 
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Ok.
I didn't know I was helping the Odd Perfect Number project!

Carlos
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