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-   -   Found a factor? Post it here. (https://www.mersenneforum.org/showthread.php?t=13977)

Jwb52z 2022-10-12 00:39

P-1 found a factor in stage #1, B1=532000.
UID: Jwb52z/Clay, M116569127 has a factor: 266249286413989795278289 (P-1, B1=532000)

77.817 bits.

James Heinrich 2022-10-14 18:06

[M]M29912549[/M] has a 187.551-bit (57-digit) [b]composite[/b] (P26+P32) factor: [url=https://www.mersenne.ca/M29912549]287459891648315148823191561314349116044826697280023403343[/url] (P-1,B1=1040000,B2=822096990)

Denial140 2022-10-26 08:33

[M]M2223391[/M] has a factor: 443333026740484658443526761

27 digits, ECM curve 6 at B1=250K

9 to go :)

Jwb52z 2022-10-27 18:28

P-1 found a factor in stage #2, B1=533000, B2=18463050.
UID: Jwb52z/Clay, M116726293 has a factor: 422214145469417013596137 (P-1, B1=533000, B2=18463050)

78.482 bits.

Jwb52z 2022-10-29 20:31

P-1 found a factor in stage #1, B1=533000.
UID: Jwb52z/Clay, M116736877 has a factor: 1009149511161291233295431 (P-1, B1=533000)

79.739 bits.

harlee 2022-10-31 22:54

P-1 found a factor in stage #2, B1=650000, B2=730452492.
UID: harlee/i5-5250U_1600, M[URL="https://www.mersenne.ca/exponent/1964659"]1964659 [/URL]has a factor: 2871582950246945708021469878076620907631 (P-1, B1=650000, B2=730452492)

131.077 bits - should be around #204 on the Top 500 P-1 factors of all time

Jwb52z 2022-11-03 17:14

P-1 found a factor in stage #2, B1=524000, B2=18373500.
UID: Jwb52z/Clay, M116761429 has a factor: 69604789456343338573961279 (P-1, B1=524000, B2=18373500)

85.847 bits.

mrh 2022-11-10 02:31

[M]M85324777[/M] has a 166-bit composite factor:

[M]M85324777[/M] has a 85.156-bit (26-digit) factor: [url=https://www.mersenne.ca/M85324777]43094916270713943094625681[/url] (P-1,B1=582000,B2=678423900)
[M]M85324777[/M] has a 80.869-bit (25-digit) factor: [url=https://www.mersenne.ca/M85324777]2207283582140433613611281[/url] (P-1,B1=582000,B2=678423900)

Rubiksmath 2022-11-11 07:52

Got my first ECM factor today, incidentally the same day I finished final exams for school.
173734333693076265170382473 divides M222613.
Interesting that it was a 27 digit factor, the ECM effort ran on that number before my attempts had the FacMiss of a 25 digit factor of 0.01%, don't know how that translates to 27 digits but I imagine not more than a few percent. So I guess a bit lucky that an easy factor existed and had yet to be found and was mine for the taking, the t35 sized curves found it pretty quick.

Jwb52z 2022-11-13 06:55

P-1 found a factor in stage #2, B1=525000, B2=18387450.
UID: Jwb52z/Clay, M116859733 has a factor: 234948870515848091653027807 (P-1, B1=525000, B2=18387450)

87.602 bits.

Jwb52z 2022-11-17 05:40

P-1 found a factor in stage #1, B1=525000.
UID: Jwb52z/Clay, M116910499 has a factor: 10142756700209147250798455167 (P-1, B1=525000)

93.034 bits.


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