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-   -   (Preying for) World Record P-1! (https://www.mersenneforum.org/showthread.php?t=27406)

lisanderke 2021-12-20 22:15

[QUOTE=Prime95;595744]My first find for this project!

{"status":"F", "exponent":79259, "worktype":"P-1", "factors":["5397816232739964621072948142158502627401583"], "b1":1000000000, "b2":1000000000, "fft-length":4096}[/QUOTE]
Awesome! That's quite a big find as well :)


I'll be taking 41k and 42k up to B1=1B too. That leaves us with the following reservations currently:
George Woltman - 79k 80k 81k
Lisander Viaene - 40k 41k 42k

ATH 2022-01-16 03:13

1 Attachment(s)
I did a big P-1 run with GMP-ECM on M4933 with the 10 known factors removed:
[CODE](2^4933-1)/29599/3637821119/25117652081/35368771391/169745595529/90043391515951/740782867588969631/359805386252506578683471/47332662224988461128710060020435516120344835557993/1552544580255765059978618542093161661106227966313804593681333703[/CODE]

P-1: B1=200*10[SUP]9[/SUP] B2=5*10[SUP]16[/SUP]

I attached the stage1 file if anyone will ever want to take it further. Stage2 can be done in stages so can be continued from 5*10[SUP]16[/SUP].
You just have to write for example (M4933.txt has the line above with all the factors):
ecm.exe -v -pm1 -maxmem 16000 -resume M4933pm200.txt 200e9 50000e12-50100e12 < M4933.txt


I did not add the limits I did to the primenet server, it will just generate a ridiculous number of Ghz-Days. Unless the information can be added manually.

Prime95 2022-01-23 22:47

Thusfar, I've found 6 new factors in the 79K,80K,81K ranges using B1=1e12, B2=20e15.

I'm reserving ranges 76K,77K,78K.

Ethan (EO) 2022-01-29 01:13

I found 2 biggish factors -- 129 & 134 bits -- in my first batch of exponents in the 14k range:

M14321 Factor: 1227402003319228348725041527104377980649 / (P-1, B1=1000000000, B2=3088390743498060)
M14387 Factor: 27562343134739559423772046255780767094401 / (P-1, B1=1000000000, B2=3088390743498060)

I've been haphazardly poking around in the 1k and 4-5k regions as well and plan to finish up 14k.

SethTro 2022-01-29 10:00

Ethan I would suggest not working below 8K, those numbers have had substantial ECM by Ryan and I would be amazed if you found any factor below 200 bits.

Ethan (EO) 2022-01-29 17:25

[QUOTE=SethTro;599003]Ethan I would suggest not working below 8K, those numbers have had substantial ECM by Ryan and I would be amazed if you found any factor below 200 bits.[/QUOTE]

Thanks for the heads-up - I’ll stick to 8k+ after runs in progress wrap up 👍

Prime95 2022-03-19 21:24

[QUOTE=Prime95;598682]I'm reserving ranges 76K,77K,78K.[/QUOTE]

I'm wrapping up this range, found at least 4 new factors.

Reserving 75K.

Prime95 2022-04-01 01:48

Now taking 74000 - 74999

Prime95 2022-04-05 00:51

and now 73000 - 74000

chalsall 2022-04-05 01:04

[QUOTE=Prime95;603308]and now 73000 - 74000[/QUOTE]

[URL="https://www.youtube.com/watch?v=yajdlBZSw3Y"]And a bit of Beethoven[/URL].

And a bit of silence.

To be sincere. I greatly enjoy silence.

petrw1 2022-04-06 04:18

Avoiding toe stepping...
 
Work is starting on the next P-1 project taking advantage of v30.8 [URL="https://www.mersenneforum.org/showpost.php?p=597569&postcount=1"]here[/URL]
I'm hoping/expecting it will pick up in the next couple weeks as the under 2000 warps up.

At the highest level it's goals are very similar to this project: taking advantage of the power of v30.8 to find LOTS of P-1 factors.

That said, no one in either project wants to get in the way of the other (i.e. working in the same exponent ranges).
Neither project has a lot of effort/assignees but we still want to respect each other.

I will try to maintain an "assigned" list in Post #1 of the project noted above.
I've noticed post #98 mentions some "claims" in this project.

If this project wants to stake claim to every exponent under, say 100K?, I'm sure we can respect that.

I can tell from recent activity that there is more independent P-1 activity but I suggest that is the nature of the beast. We have no right to say what anyone can or cannot work on. That we will live with.

I welcome any thoughts.

Wayne

Prime95 2022-04-09 17:02

For future reservations, please use this thread:

[url]https://www.mersenneforum.org/showthread.php?t=27477[/url]

nordi 2022-05-23 17:05

[M]M36919[/M] has a 180.968-bit (55-digit) factor: [URL="https://www.mersenne.ca/M36919"]2997347544642661833497896836795494793702018162645139063[/URL] (P-1,B1=2000000000,B2=401927737170960)


That gets me to the top of the [URL="https://www.mersenne.ca/userfactors/pm1/1/bits"]list of P-1 factors for Mersenne numbers[/URL]! And all thanks to the new version 30.8 of mprime.


:maybeso::wacky:

ewmayer 2022-05-25 22:34

[QUOTE=nordi;606366][M]M36919[/M] has a 180.968-bit (55-digit) factor: [URL="https://www.mersenne.ca/M36919"]2997347544642661833497896836795494793702018162645139063[/URL] (P-1,B1=2000000000,B2=401927737170960)


That gets me to the top of the [URL="https://www.mersenne.ca/userfactors/pm1/1/bits"]list of P-1 factors for Mersenne numbers[/URL]! And all thanks to the new version 30.8 of mprime.[/QUOTE]

Using the 3 now-known factors - a quite impressive collection - the cofactor is still composite [C11008], so this is no time to rest on your laurels. :)


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