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Forum: Factoring 2020-05-22, 07:46
Replies: 496
Views: 52,439
Posted By fivemack
L4375B done

This popped up on the Mersennus.net page and I managed to complete it in three real-time weeks on one machine (I'll admit it was an i9-7940X so quite a fast machine) - 2.5 days polynomial search, a...
Forum: NFS@Home 2020-04-24, 20:48
Replies: 37
Views: 3,608
Posted By fivemack
L4635A complete

Fri Apr 24 13:58:34 2020 p62 factor: 54473084981910910373895572374171513288488971021552223758184061
Fri Apr 24 13:58:34 2020 p134 factor:...
Forum: Factoring 2020-04-19, 13:45
Replies: 1
Views: 239
Posted By fivemack
Dividing out by the counts of prime ideals (which...

Dividing out by the counts of prime ideals (which are just length(polrootsmod(f,p)) ) gives something with much nicer statistical properties - the linear fit has an r^2 of 0.998 rather than 0.957,...
Forum: Factoring 2020-04-15, 10:48
Replies: 1
Views: 239
Posted By fivemack
Yields with 16e

This is a 16e factorisation of a GNFS-200.0 number (and about a third complete)

I am a little surprised that, with alim=rlim=400M, I'm seeing the yield increasing monotonically as Q goes down all...
Forum: NFS@Home 2020-03-31, 14:24
Replies: 37
Views: 3,608
Posted By fivemack
L4635A started

ETA 23 April evening
Forum: Aliquot Sequences 2020-03-26, 16:36
Replies: 3,291
Views: 237,802
Posted By fivemack
Taking 661998

Taking 661998
Forum: Aliquot Sequences 2020-03-26, 16:36
Replies: 3,291
Views: 237,802
Posted By fivemack
Drop 642768 (2^2 * 269 * ECMed C141)

Drop 642768 (2^2 * 269 * ECMed C141)
Forum: Information & Answers 2020-03-22, 10:20
Replies: 3
Views: 534
Posted By fivemack
Run memtest (a modern version, download from...

Run memtest (a modern version, download from memtest86.com rather than using the version that appears in your boot-loader menu); those squashfs errors look like defective memory modules to me.

The...
Forum: Factoring 2020-03-21, 07:04
Replies: 496
Views: 52,439
Posted By fivemack
Currently running L4235A C201, which is going to...

Currently running L4235A C201, which is going to take quite a while; will do 145!-1 after that. With the plague now and a baby due in June I doubt my hardware resources will grow in the next 18...
Forum: Factoring 2020-03-21, 00:04
Replies: 496
Views: 52,439
Posted By fivemack
167!-1 done

Fri Mar 20 19:48:18 2020 p78 factor: 339681113011636637534097684131750881577621867753623483183030698483021419238073
Fri Mar 20 19:48:18 2020 p104 factor:...
Forum: NFS@Home 2020-03-20, 09:49
Replies: 37
Views: 3,608
Posted By fivemack
F1645 complete

Thu Mar 19 22:12:36 2020 p75 factor: 124480030191217022570101563396234688664281201878322907744151618458267884541
Thu Mar 19 22:12:36 2020 p124 factor:...
Forum: NFS@Home 2020-03-09, 18:25
Replies: 37
Views: 3,608
Posted By fivemack
There will be a delay; the job crashed early...

There will be a delay; the job crashed early morning 7 March and the machine is currently unresponsive over the network and moreover in a different city from me.

(there will be more of a delay; I...
Forum: NFS@Home 2020-03-09, 13:24
Replies: 37
Views: 3,608
Posted By fivemack
L2965B complete

Sat Mar 7 00:57:47 2020 p117 factor: 130793892095011010261570807276990949088253001123492162239158601294648700615532642298214759019715949581932350224038801
Sat Mar 7 00:57:47 2020 p126 factor:...
Forum: Factoring 2020-03-06, 14:26
Replies: 3
Sticky: RSA-250
Views: 3,892
Posted By fivemack
So it's still a factor three more runtime for ten...

So it's still a factor three more runtime for ten more digits at the 240-digit level; interesting to know. Maybe slightly lower for the linear algebra.

(800/100 X6130-core-years for RSA240;...
Forum: Information & Answers 2020-03-01, 20:36
Replies: 15
Views: 1,406
Posted By fivemack
I do wish that operating system manufacturers...

I do wish that operating system manufacturers would provide a version that unleashes the full speculation potential of our hardware, for people actually wanting to do computation rather than checking...
Forum: NFS@Home 2020-03-01, 09:52
Replies: 37
Views: 3,608
Posted By fivemack
L2965B eta morning of March 7

L2965B eta morning of March 7
Forum: Astronomy 2020-02-24, 18:55
Replies: 10
Views: 788
Posted By fivemack
I hadn't heard of using asteroid occultations to...

I hadn't heard of using asteroid occultations to measure stars - I guess there's much less stray light than the lunar-limb method, and you can do it for stars that don't get occulted by the Moon.
Forum: Factoring 2020-02-20, 11:36
Replies: 42
Views: 3,205
Posted By fivemack
So that's a significantly larger and heavier...

So that's a significantly larger and heavier matrix than the RSA-768 factorisation from INRIA; what was the point of doing all that computation to demonstrate they were less effective at factoring a...
Forum: NFS@Home 2020-02-17, 07:10
Replies: 37
Views: 3,608
Posted By fivemack
ETA for F1645 is 11 March: 46.9M matrix

ETA for F1645 is 11 March: 46.9M matrix
Forum: NFS@Home 2020-02-13, 07:35
Replies: 37
Views: 3,608
Posted By fivemack
F1459 done

Wed Feb 12 23:55:48 2020 p77 factor: 27699165354693819016801075486232972683723699059340461464932398144896384968753
Wed Feb 12 23:55:48 2020 p123 factor:...
Forum: Software 2020-02-09, 20:48
Replies: 46
Views: 4,325
Posted By fivemack
I am a little confused by what's happening here: ...

I am a little confused by what's happening here:


Timing 20480K FFT, 12 cores, 2 workers. Average times: 50.92, 50.64 ms. Total throughput: 39.39 iter/sec.
[Worker #1 Feb 4 17:37] Timing...
Forum: Miscellaneous Math 2020-02-09, 20:21
Replies: 6
Views: 617
Posted By fivemack
An analogous question: Prove there is no...

An analogous question:

Prove there is no integer for which n, 2n, 4n, ..., (2^20)n all have no 0 in their decimal expansion

Find an integer for which n, 2n, 4n, ..., (2^19)n all have no 0 in...
Forum: Miscellaneous Math 2020-02-09, 19:54
Replies: 6
Views: 617
Posted By fivemack
An unreasonable operation

Consider the operation where you double a number and then cross out all the zeroes in its base-10 representation

eg 34 -> 68 -> 136 -> 272 -> 544 -> 188 -> 376 -> 752 -> 154 -> 38 -> 76 -> 152 ->...
Forum: CADO-NFS 2020-01-27, 19:57
Replies: 479
Sticky: CADO NFS
Views: 40,285
Posted By fivemack
well that was silly

I had thought I could use -admin X -incr 420 and -admin {X+210} -incr 420 on two machines to search a wide c5 range efficiently. But in fact polyselect adjusts admin to the next multiple of incr,...
Forum: Aliquot Sequences 2020-01-12, 20:21
Replies: 262
Views: 11,956
Posted By fivemack
I've done some more lines on 23^8

I've done some more lines on 23^8
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