20051228, 07:07  #1 
Sep 2004
2×5×283 Posts 
Found something here
A factor was found for 3037_73M.C251 using GMPECM using factor method ECM
Candidate number: 544713379582040389926882455038 51182120843617942033826720978156865956893140612939928579441838806971624415850520171245804056141567802318034050852879824009067809418896523589524538881682631488528799177522680274414145034524836746236986253623331102234685561 Factor: 89967105661394634963947134669 Factor Type: probable CoFactor: 605458379012608168505378881528807004355481347052195502602875639159909481485241046497849947638983276547821427620623094550779954365111663174767236489888030484459390772067856344268616228400139113458872266226098496244818968669 CoFactor Type: Probable B1: 1000000 Sigma: 1734120809 Finder: myemailaddress Found on machine: 1 
20051228, 07:41  #2 
Jun 2003
1,579 Posts 
Congrats, Carlos!

20051228, 09:48  #3 
Sep 2004
5416_{8} Posts 
Thanks Citrix.
Double check needed. Factors.log content: [20051228 02:40:28 GMT] a: Factor found! 3037_73M.C251 / (probable) 89967105661394634963947134669 B1: 1000000 sigma: 1734120809 (found in step 1) [20051228 02:40:28 GMT] a: Cofactor: 3037_73M.C251 / (Probable) 605458379012608168505378881528807004355481347052195502602875639159909481485241046497849947638983276547821427620623094550779954365111663174767236489888030484459390772067856344268616228400139113458872266226098496244818968669 Carlos Last fiddled with by em99010pepe on 20051228 at 09:54 
20051228, 11:28  #4 
Mar 2004
Belgium
1101001001_{2} Posts 
The doublecheck is running:
Parameters: Code:
ecm sigma 1734120809 v 1000000 544713379582040389926882455038 51182120843617942033826720978156865956893140612939928579441838806971624415850520171245804056141567802318034050852879824009067809418896523589524538881682631488528799177522680274414145034524836746236986253623331102234685561 C. Using gmpecm 6.0.1 powered by gmp 4.1.4 
20051228, 11:52  #5  
Bamboozled!
"πΊππ·π·π"
May 2003
Down not across
2·7^{2}·109 Posts 
Quote:
Why on earth are you spending vast amounts of computation rerunning 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 

20051228, 12:26  #6 
Mar 2004
Belgium
29^{2} Posts 
sorry xilman I am not as smart as you therefore quitting the check
Last fiddled with by ValerieVonck on 20051228 at 12:26 
20051228, 13:42  #7  
Aug 2005
Brazil
101101010_{2} Posts 
Quote:
EDIT: And the cofactor is a prime. Last fiddled with by fetofs on 20051228 at 13:52 

20060102, 02:25  #8 
"William"
May 2003
New Haven
3·787 Posts 
This factor comes from the OddPerfect More Wanted ecm server at oddperfect.noip.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.

20060102, 10:12  #9 
Sep 2004
2×5×283 Posts 
Ok.
I didn't know I was helping the Odd Perfect Number project! Carlos 
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