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Forum: Factoring 2022-05-19, 15:42
Replies: 485
Views: 73,917
Posted By chris2be8
Does anyone know who factored 91^139-1 ? When I...

Does anyone know who factored 91^139-1 ? When I checked the last holes after factoring 19^221-1 I noticed it was factored. The factors were not in factordb (just in http://myfactors.mooo.com/) so I...
Forum: NFS@Home 2022-05-18, 16:00
Replies: 78
Views: 5,532
Posted By chris2be8
f19_221m1 is done: p76 factor:...

f19_221m1 is done:

p76 factor: 3798565872679392977764923872359903722908914263900592144316654818841325041927
p81 factor:...
Forum: Factoring 2022-05-18, 15:54
Replies: 22
Views: 578
Posted By chris2be8
Most interesting numbers would have a formula, eg...

Most interesting numbers would have a formula, eg (91^145-1)/90, a lot shorter than the decimal expansion of the number. You could find a lot of such numbers in factordb (even if you only accept...
Forum: Lounge 2022-05-17, 16:10
Replies: 1,691
Views: 192,588
Posted By chris2be8
The best guess for a country is the number of...

The best guess for a country is the number of excess deaths over the number that would normally have occurred over the relevant time period. That doesn't depend on how much testing was done. It's...
Forum: NFS@Home 2022-05-17, 15:42
Replies: 78
Views: 5,532
Posted By chris2be8
Taking f89_143m1

Taking f89_143m1
Forum: Factoring 2022-05-13, 16:06
Replies: 485
Views: 73,917
Posted By chris2be8
89^145-1 was not factored when I started work on...

89^145-1 was not factored when I started work on it, my script to run ECM checks factordb first.

I then found another factor by ECM:

GPU: factor 243056674739683873052967962822255497291 found in...
Forum: And now for something completely different 2022-05-13, 15:36
Replies: 105
Views: 4,577
Posted By chris2be8
Is FastECPP significantly faster than primo for...

Is FastECPP significantly faster than primo for 300-2000 digit primes? I've automated primo by using xdotool and I'm working to prove 300+ digit PRPs in factordb. FastECPP would be easier to automate...
Forum: Factoring 2022-05-12, 16:25
Replies: 485
Views: 73,917
Posted By chris2be8
89^145-1 won't get to NFS@Home: GPU: factor...

89^145-1 won't get to NFS@Home:

GPU: factor 267697400207700352494793748295552781 found in Step 1 with curve 2135 (-sigma 3:1305731694)
Computing 2432 Step 1 took 322ms of CPU time / 384212ms of...
Forum: NFS@Home 2022-05-12, 16:20
Replies: 63
Views: 3,634
Posted By chris2be8
QUEUED AS f89_143m1 ...

QUEUED AS f89_143m1

(89^143-1)/278957920645440651421693664015347166365998606376504 from the Brent tables:

# Built Sun Feb 6 21:28:05 2022
# Estimated SNFS difficulty 253., GNFS equivalent...
Forum: NFS@Home 2022-05-12, 16:10
Replies: 78
Views: 5,532
Posted By chris2be8
f19_221m1 has built a matrix. LA should finish in...

f19_221m1 has built a matrix. LA should finish in about 136 hours.
Forum: Factoring 2022-05-12, 16:04
Replies: 485
Views: 73,917
Posted By chris2be8
Reserving...

Reserving (89^145-1)/18796294813815912042331920019780084220896447379184531326974846922889105263559538162281227528 for ECM etc.
Forum: NFS@Home 2022-05-07, 15:56
Replies: 63
Views: 3,634
Posted By chris2be8
Thanks. Although can you update it to say...

Thanks.

Although can you update it to say I'll do the LA?

Done.
Forum: NFS@Home 2022-05-06, 15:55
Replies: 63
Views: 3,634
Posted By chris2be8
QUEUED AS f19_221m1 ...

QUEUED AS f19_221m1

(19^221-1)/4148232674036588020075653952816245435324486 from the Brent tables:

# Built Wed Jan 26 17:23:24 2022
# Estimated SNFS difficulty 260., GNFS equivalent 186, GNFS...
Forum: Factoring 2022-05-05, 15:31
Replies: 485
Views: 73,917
Posted By chris2be8
19^221-1 has nearly finished ECM so: ...

19^221-1 has nearly finished ECM so:

Reserving (89^143-1)/278957920645440651421693664015347166365998606376504 for ECM, then NFS@Home unless I get lucky.
Forum: NFS@Home 2022-05-02, 15:35
Replies: 78
Views: 5,532
Posted By chris2be8
f86_145m1 is done: p94 factor:...

f86_145m1 is done:

p94 factor: 2273197615300744837889778138395568573651196722098504698237387817971010869490972867935010583481
p104 factor:...
Forum: NFS@Home 2022-04-30, 15:31
Replies: 78
Views: 5,532
Posted By chris2be8
f86_145m1 has built a matrix. LA should finish in...

f86_145m1 has built a matrix. LA should finish in about 39 hours.
Forum: Factoring 2022-04-29, 15:39
Replies: 485
Views: 73,917
Posted By chris2be8
Reserving...

Reserving (19^221-1)/4148232674036588020075653952816245435324486 for ECM, then NFS@Home if necessary.
Forum: NFS@Home 2022-04-29, 15:33
Replies: 78
Views: 5,532
Posted By chris2be8
f86_143m1 is done, with a nice split: p110...

f86_143m1 is done, with a nice split:

p110 factor: 13550249302983594577185392832525786857777359924943377541353930166735461370415428464117982747027624814691967897
p119 factor:...
Forum: CADO-NFS 2022-04-27, 15:46
Replies: 8
Views: 380
Posted By chris2be8
The combined difficulty, 1.208e-14, would be the...

The combined difficulty, 1.208e-14, would be the best indicator of how hard a job will be. Run time will be inversely proportional to it. But the constant varies with degree so you can't directly...
Forum: GpuOwl 2022-04-27, 15:27
Replies: 34
Views: 2,059
Posted By chris2be8
That implies each memory cycle transfers 16 bits....

That implies each memory cycle transfers 16 bits. Which is a plausible value. Although not directly useful when running programs on it.
Forum: NFS@Home 2022-04-26, 15:49
Replies: 63
Views: 3,634
Posted By chris2be8
I meant to say 32/31 yield would be larger than...

I meant to say 32/31 yield would be larger than necessary so would take longer to download the relations and probably longer to solve the matrix.


NB. I'll do the LA for f86_145m1 (forgot to say...
Forum: NFS@Home 2022-04-25, 15:41
Replies: 63
Views: 3,634
Posted By chris2be8
QUEUED AS f86_145m1 ...

QUEUED AS f86_145m1

(86^145-1)/342566367793797626159014316352812442963809646440823536952804035860520605898880194075 from the Brent tables:

# Record 1 match 1 from parameters read Thu Mar 17...
Forum: NFS@Home 2022-04-25, 15:33
Replies: 78
Views: 5,532
Posted By chris2be8
f86_143m1 has built a matrix. LA should finish in...

f86_143m1 has built a matrix. LA should finish in about 83 hours.
Forum: Factoring 2022-04-24, 15:46
Replies: 55
Views: 4,470
Posted By chris2be8
It looks as if you had just finished sieving and...

It looks as if you had just finished sieving and started LA (linear algebra) when the system overheated. So you are most of the way there.

I suggest:

1: Back up everything in the working...
Forum: Factoring 2022-04-22, 20:17
Replies: 485
Views: 73,917
Posted By chris2be8
Reserving...

Reserving (86^145-1)/342566367793797626159014316352812442963809646440823536952804035860520605898880194075 for ECM, then NFS@Home if necessary.
Showing results 1 to 25 of 1000

 
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