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-   -   fond of a factor? Urn yourself to become remains (https://www.mersenneforum.org/showthread.php?t=13977)

Dubslow 2015-12-04 23:39

Nice find :tu:

Jwb52z 2015-12-14 19:44

P-1 found a factor in stage #1, B1=640000.
UID: Jwb52z/Clay, M74822911 has a factor: 246259810267427297611010947961 (P-1, B1=640000)

97.636 bits.

VictordeHolland 2015-12-14 21:20

Every time I see a new post here I'm hoping it is a factor of M1277 or M1619, even tough I know it is very unlikely :razz:

alpertron 2015-12-17 02:21

[QUOTE=Jwb52z;418258]P-1 found a factor in stage #2, B1=645000, B2=12255000.
UID: Jwb52z/Clay, M75143573 has a factor: 2223935088334736540260164531842793066322489490183317406066993 (P-1, B1=645000, B2=12255000)

It's a composite factor according to Prime95, but the results file doesn't save the 2 parts that this factor becomes, so I don't know how to post them to this message.[/QUOTE]

You can see both prime factors at: [url]http://www.mersenne.org/report_exponent/?exp_lo=75143573&exp_hi=[/url]

Jwb52z 2015-12-18 01:24

P-1 found a factor in stage #2, B1=635000, B2=11906250.
UID: Jwb52z/Clay, M74476733 has a factor: 336605492262437911582967 (P-1, B1=635000, B2=11906250)

78.115 bits.

firejuggler 2015-12-18 11:21

[Fri Dec 18 10:17:33 2015]
P-1 found a factor in stage #2, B1=885000, B2=23231250, E=6.
UID: firejuggler, M79022257 has a factor: 229423566425068458592273046541231647814785995393 (P-1, B1=885000, B2=23231250, E=6), (157 bits)

it is composite of course,229423566425068458592273046541231647814785995393 =38679971773795566333239 (75 bits) * 5931327141776652671572487 (82.3 bits)

Gordon 2016-01-25 23:17

201667 - factored
 
It has a 91 bit factor

[Sun Jan 24 08:10:30 2016]
ECM found a factor in curve #112, stage #2
Sigma=8829084939581650, B1=250000, B2=30000000.
M201667 has a factor: 2073051546873901675394238319 (ECM curve 112, B1=250000, B2=30000000)

christian_ 2016-02-09 18:09

M137395267 has a factor: 299720439373335925337 [TF:68:69:mfaktc 0.21 barrett76_mul32_gs]
found 1 factor for M137395267 from 2^68 to 2^69 [mfaktc 0.21 barrett76_mul32_gs]
[I]my first find! 68 bits[/I]

M78914653 has a factor: 3946892419366218369503 [TF:71:72:mfaktc 0.21 barrett76_mul32_gs]
found 1 factor for M137395267 from 2^71 to 2^72 [mfaktc 0.21 barrett76_mul32_gs]

LaurV 2016-02-10 05:23

[QUOTE=christianpoland;425739][I]my first find! 68 bits[/I]
[/QUOTE]
Welcome to the club. We understand your enthusiasm, and we like it :smile:, but first, you don't need to post every (small) factor you find, and second, technically, that number has 69 bits :razz:

Again, welcome to the fray!

Gordon 2016-02-17 11:24

M146059
 
Not mine unfortunately, I logged in factoring results for numbers in the 140k range and got a result not needed for the above, this is the reason why

2016-02-15 kadir emir Factor: 12663133710644208611823239476283651826271

133 bits....

Jwb52z 2016-02-21 20:58

P-1 found a factor in stage #2, B1=645000, B2=12416250.
UID: Jwb52z/Clay, M77321767 has a factor: 63410308039841666453639 (P-1, B1=645000, B2=12416250)

75.747 bits.


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