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

 LaurV 2022-08-18 05:03

[QUOTE=Denial140;611663]1 down from 2.22M, 11 more to go[/QUOTE]
Congrats!
:party:
I hammered that interval with P-1, P+1, and ECM (not all results reported, but P-1 was reported all) till my keyboard was hurting ...

 Denial140 2022-08-18 12:05

Do you know roughly how much ECM you did? Wondering if I should just move to t30 bounds straight away

 LaurV 2022-08-19 02:31

Looking to the full stats, with ECM history turned ON, ([URL="https://www.mersenne.org/report_exponent/?exp_lo=2220000&exp_hi=2230000&full=1&ecmhist=1"]here[/URL]), I think you should! It may take longer per candidate, and it may take longer to churn ALL the range, but IF there are still 11 factors there to be found under 30-35 digits, and your intention is to stop after founding them, then you may get luckier with higher ECM boundaries.

 Zhangrc 2022-08-20 11:38

[QUOTE=Jwb52z;611229]P-1 found a factor in stage #2, B1=488000, B2=12420000.
UID: Jwb52z/Clay, M116162087 has a factor: 63220472344899739179621176191 (P-1, B1=488000, B2=12420000)

95.674 bits.[/QUOTE]

You seemed to have given Prime95 very little memory. If my guess is correct, you gave no more than 3GB to Prime95, so even v30.8 could not help.

 Prime95 2022-08-20 18:04

A personal best:

M96281 Factor: 1932964842504334487497426969214870710558093976608197223 / (P-1, B1=1000000000, B2=70541506035000)

 Miszka 2022-08-20 18:08

[QUOTE=Prime95;611791]A personal best:

M96281 Factor: 1932964842504334487497426969214870710558093976608197223 / (P-1, B1=1000000000, B2=70541506035000)[/QUOTE]

This is probably the largest factor found using the P-1 method. Congratulations.

 charybdis 2022-08-20 18:29

[QUOTE=Miszka;611792]This is probably the largest factor found using the P-1 method. Congratulations.[/QUOTE]

Not even close. It just misses out on the [URL="https://members.loria.fr/PZimmermann/records/Pminus1.html"]all-time top 10[/URL].
It's [URL="https://www.mersenne.ca/userfactors/pm1/1/bits"]2nd place[/URL] for GIMPS, as you would find out if you [URL="https://mersenneforum.org/showthread.php?p=606342"]read a bit further back in this thread[/URL].

And yes, congrats George!

 Jwb52z 2022-08-21 04:54

P-1 found a factor in stage #1, B1=478000.
UID: Jwb52z/Clay, M115938923 has a factor: 537366952842508263782407 (P-1, B1=478000)

78.830 bits.

 Jwb52z 2022-08-21 04:59

[QUOTE=Zhangrc;611779]You seemed to have given Prime95 very little memory. If my guess is correct, you gave no more than 3GB to Prime95, so even v30.8 could not help.[/QUOTE]I didn't tell it anything specific. It just runs when I start it. I don't remember ever having to manually do anything with the program. If I did, it was a long time ago.

 harlee 2022-08-21 12:08

[URL="https://www.mersenne.ca/exponent/2808107"]M2808107[/URL] has a factor: 7900095067082114257729144052680503930041434607 (P-1, B1=288000, B2=226423890) (152.469 bits)

Composite factor 7900095067082114257729144052680503930041434607 = 34629566657233801103447449 * 228131502345319020743

228131502345319020743 (67.628 bits)

34629566657233801103447449 (84.840)

 harlee 2022-08-21 12:16

P-1 found a factor in stage #2, P-1, B1=240000, B2=199861200

UID: harlee/i5-4250U_1400, [URL="https://www.mersenne.ca/exponent/2520769"]M2520769[/URL] has a factor: 60124728585112875608389059125941476926701494031 (P-1, B1=240000, B2=199861200)

117.027 bits

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