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Search: Posts Made By: fivemack
Forum: Aliquot Sequences 2021-09-18, 11:02
Replies: 3,574
Views: 361,033
Posted By fivemack
Drop 1193460 (2^4 * 311 * ready-for-GNFS C143)

Drop 1193460 (2^4 * 311 * ready-for-GNFS C143)
Forum: Aliquot Sequences 2021-09-12, 22:10
Replies: 3,574
Views: 361,033
Posted By fivemack
Drop 1061748 (2^3*3^2, ECMed C140)

Drop 1061748 (2^3*3^2, ECMed C140)
Forum: Aliquot Sequences 2021-08-30, 21:52
Replies: 3,574
Views: 361,033
Posted By fivemack
Drop 1286640 (142 digits, 2^5*3^2*7)

Drop 1286640 (142 digits, 2^5*3^2*7)
Forum: Aliquot Sequences 2021-08-27, 20:21
Replies: 3,574
Views: 361,033
Posted By fivemack
Drop 785142 (2^3*3^2, reasonably-ECMed C139)

Drop 785142 (2^3*3^2, reasonably-ECMed C139)
Forum: Aliquot Sequences 2021-08-27, 20:20
Replies: 3,574
Views: 361,033
Posted By fivemack
Drop 2541810 (2^2 * 3^3 * reasonably-ECMed C147)

Drop 2541810 (2^2 * 3^3 * reasonably-ECMed C147)
Forum: Aliquot Sequences 2021-08-15, 20:59
Replies: 3,574
Views: 361,033
Posted By fivemack
Take 558360

Take 558360
Forum: Msieve 2021-08-07, 11:10
Replies: 52
Sticky: Msieve GPU LA
Views: 2,523
Posted By fivemack
Interesting! That's about a p3.8xlarge instance,...

Interesting! That's about a p3.8xlarge instance, for which the spot price is $4/hr, so that's $84 = £60 to solve the matrix.

I'm paying 19p/kWh here, and my Skylake machine uses about 250W and...
Forum: Aliquot Sequences 2021-08-07, 09:37
Replies: 3,574
Views: 361,033
Posted By fivemack
Take 1432980

Take 1432980
Forum: Aliquot Sequences 2021-08-03, 08:09
Replies: 3,574
Views: 361,033
Posted By fivemack
Take 785142

Take 785142
Forum: Aliquot Sequences 2021-07-31, 21:31
Replies: 3,574
Views: 361,033
Posted By fivemack
Take 1286640

Take 1286640
Forum: Soap Box 2021-07-24, 22:32
Replies: 87
Views: 6,296
Posted By fivemack
I don't think the fires put particles high enough...

I don't think the fires put particles high enough up into the atmosphere - there's the tropopause between the troposphere and the stratosphere, which obstructs the movement of particles either...
Forum: Aliquot Sequences 2021-07-24, 17:07
Replies: 3,574
Views: 361,033
Posted By fivemack
Take 613872 791220

Take 613872 791220
Forum: Aliquot Sequences 2021-07-24, 16:58
Replies: 3,574
Views: 361,033
Posted By fivemack
Drop 1057932 (2^2 * 3 * 19 * C140 which has...

Drop 1057932 (2^2 * 3 * 19 * C140 which has survived 7000@3e6)
Forum: Software 2021-07-16, 09:29
Replies: 36
Views: 1,717
Posted By fivemack
Yes, the normal Linux enumeration is 0 to 2N-1 as...

Yes, the normal Linux enumeration is 0 to 2N-1 as physical cores, N in each socket, and 2N to 4N-1 as the logical cores - I determined this rather tediously by running two copies of ECM at a time and...
Forum: Software 2021-07-10, 18:50
Replies: 36
Views: 1,717
Posted By fivemack
I'd be surprised if you could get anything much...

I'd be surprised if you could get anything much higher performance ... the board won't support the bizarre Platinum 92xx dual-chip packages, and the absolutely highest performance Platinum 82xx is 28...
Forum: Aliquot Sequences 2021-07-10, 09:53
Replies: 3,574
Views: 361,033
Posted By fivemack
Drop 2385042. 2^2 * C141 which has survived my...

Drop 2385042. 2^2 * C141 which has survived my usual 7000@3e6.
Forum: Software 2021-07-09, 13:59
Replies: 36
Views: 1,717
Posted By fivemack
Are these the same CPUs as...

Are these the same CPUs as https://www.ebay.co.uk/itm/154497112899 ? I was expecting there to be a catch, if they work well I'll pick myself up a pair. I've got a Supermicro Skylake system which...
Forum: Aliquot Sequences 2021-07-05, 13:38
Replies: 3,574
Views: 361,033
Posted By fivemack
Drop 995280. Driver 2*3, C148 has survived about...

Drop 995280. Driver 2*3, C148 has survived about 7000 curves at B1=3e6
Forum: Msieve 2021-06-27, 13:05
Replies: 5
Views: 463
Posted By fivemack
Well, that's not actually the cause; the vpxor...

Well, that's not actually the cause; the vpxor xmm0,xmm0,xmm0 instruction is in fact defined as clearing the top half of the register (whilst the superficially similar pxor xmm0,xmm0 is defined as...
Forum: Aliquot Sequences 2021-06-27, 09:43
Replies: 3,574
Views: 361,033
Posted By fivemack
Take 2541810

Take 2541810
Forum: Msieve 2021-06-27, 09:35
Replies: 5
Views: 463
Posted By fivemack
I am just downloading gcc-11.1 in the hope that...

I am just downloading gcc-11.1 in the hope that it will be equipped with a sufficiently heavy-duty yak razor
Forum: Msieve 2021-06-26, 22:23
Replies: 5
Views: 463
Posted By fivemack
This is driving me slightly mad: I made the...

This is driving me slightly mad: I made the obvious tweaks to use a 2-bit rather than 8-bit table, it slowed down immensely, and this was because it wasn't using YMM operations at all, rather...
Forum: Msieve 2021-06-26, 19:46
Replies: 5
Views: 463
Posted By fivemack
Profile-driven optimisation for lanczos

Has anyone got thoughts about the NxB times BxB multiply once VBITS grows big?

My profile at the moment looks like

26.39% msieve-MP-V256- msieve-MP-V256-BDW [.] mul_BxN_NxB ...
Forum: Aliquot Sequences 2021-06-26, 10:39
Replies: 3,574
Views: 361,033
Posted By fivemack
Take 1057932 1142472 2385042 2993280

Take 1057932 1142472 2385042 2993280
Forum: Aliquot Sequences 2021-06-23, 11:26
Replies: 3,574
Views: 361,033
Posted By fivemack
Drop 2327016

Drop 2327016
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