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-   -   Found a factor, sunshine? Embalm and entomb it here! (RU "Выкрасить и выбросить")) (https://www.mersenneforum.org/showthread.php?t=13977)

 James Heinrich 2021-11-01 01:24

[quote=TheJudger][M]M114860849[/M] has a 224.754-bit (68-digit) [b]composite[/b] (P32+P37) factor: [url=https://www.mersenne.ca/M114860849]45453803780256165659829228890363539404384826272845623290616298112337[/url] (P-1,B1=811000,B2=24076000,E=12)[/quote]Even just one component of that composite factor is #71 on the [url=https://www.mersenne.ca/userfactors/pm1/1/bits]biggest P-1 factors[/url] list.

 Miszka 2021-11-04 16:57

[M]M2003191[/M] has a 97.506-bit (30-digits) factor: [url=https://www.mersenne.ca/M2003191]225007102354851248019601430113[/url] (P+1, B1=30000000, B2=1620000000)
This is my second factor found using the P+1 method.
This time there is a first factor for this Mersenne number.

 Jwb52z 2021-11-05 05:51

P-1 found a factor in stage #2, B1=757000, B2=21023000.
UID: Jwb52z/Clay, M107203427 has a factor: 260429952341275128058663 (P-1, B1=757000, B2=21023000)

77.785 bits.

 Miszka 2021-11-05 18:09

[QUOTE=TheJudger]
[M]M114860849[/M] has a 224.754-bit (68-digit) composite (P32+P37) factor: 45453803780256165659829228890363539404384826272845623290616298112337 (P-1,B1=811000,B2=24076000,E=12)[/QUOTE]
Congratulations, as that's not a very common accomplishment!
In my "merchandise" I have a factor that is a tad smaller 19147642464835832222111776488276027610060674573088897824886038321359 - 223. 506 bits [M]M3146833[/M]

 Jwb52z 2021-11-05 19:18

P-1 found a factor in stage #1, B1=757000.
UID: Jwb52z/Clay, M107207129 has a factor: 98058773655358447592735572577 (P-1, B1=757000)

96.308 bits.

 ixfd64 2021-11-18 07:13

Found my largest P-1 prime factor to date. 128 bits!

[QUOTE][Tue Nov 16 23:14:04 2021]
P-1 found a factor in stage #2, B1=789000, B2=22834000, E=6.
UID: ixfd64/dt-lab-26, M112991353 has a factor: 228447809578680398866569621097916626871 (P-1, B1=789000, B2=22834000, E=6), AID: 89CC27EABD59FDBCBDF20BC67B203E7F[/QUOTE]

 James Heinrich 2021-11-18 07:15

:toot:

 axn 2021-11-18 10:38

[QUOTE=ixfd64;593344]Found my largest P-1 prime factor to date. 128 bits![/QUOTE]

Nice. But... E=6?! What version of P95 are you using?

 James Heinrich 2021-11-18 12:53

[QUOTE=axn;593352]Nice. But... E=6?! What version of P95 are you using?[/QUOTE]v30.3.6

 axn 2021-11-18 16:54