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Forum: Factoring 2021-06-12, 19:14
Replies: 353
Views: 9,631
Posted By frmky
Brilliant even!

Brilliant even!
Forum: Factoring 2021-06-07, 22:08
Replies: 353
Views: 9,631
Posted By frmky
Sorry, I forgot to mark (9, -4) in the...

Sorry, I forgot to mark (9, -4) in the spreadsheet. It's almost done.
Forum: Factoring 2021-06-07, 02:03
Replies: 353
Views: 9,631
Posted By frmky
For these polynomials, there is no small prime p...

For these polynomials, there is no small prime p for which the algebraic polynomial mod p is irreducible. The square root algorithm requires one. msieve forges ahead anyway with a small prime, which...
Forum: NFS@Home 2021-05-29, 18:34
Replies: 7
Views: 327
Posted By frmky
The university is doing a disaster drill today...

The university is doing a disaster drill today which includes cutting off access to the internet and checking the failover of critical systems. So access today will be sporadic.

The error is...
Forum: Msieve 2021-05-22, 16:16
Replies: 87
Views: 42,039
Posted By frmky
As further evidence that the filtering bug is...

As further evidence that the filtering bug is squashed, I just completed a run using 33-bit large primes with over 1 billion unique relations.

https://pastebin.com/J6hbcjzD
Forum: NFS@Home 2021-05-18, 21:04
Replies: 75
Views: 18,887
Posted By frmky
The results processing scripts are back on and...

The results processing scripts are back on and caught up.
Forum: NFS@Home 2021-05-17, 05:52
Replies: 75
Views: 18,887
Posted By frmky
Yes, the server went down last night for a few...

Yes, the server went down last night for a few hours while I slept. The PHP memory heap manager zend_mm_heap became corrupted and took down the web server. First time I've seen that error. Apache...
Forum: NFS@Home 2021-05-15, 16:37
Replies: 75
Views: 18,887
Posted By frmky
The disks are the slowest part of the system....

The disks are the slowest part of the system. With results processing off reads are currently about 1MB/s and writes bouncing between 5-10 MB/s It's RAID6 on spinning disks, both of which slows it...
Forum: NFS@Home 2021-05-15, 16:07
Replies: 75
Views: 18,887
Posted By frmky
Work has been going out, but it gets immediately...

Work has been going out, but it gets immediately gobbled up. It seems nearly everyone wants work from the lasieve_5f queue, so I've temporarily stopped feeding work from the other queues until those...
Forum: Msieve 2021-05-12, 18:47
Replies: 41
Views: 21,312
Posted By frmky
Set the cache size in the source, optionally...

Set the cache size in the source, optionally remove the loop unrolling, set the optimization flags for the machine in Makefile (really just -Ofast -mcpu=native is usually fine) and compile. In the...
Forum: Msieve 2021-05-10, 04:38
Replies: 41
Views: 21,312
Posted By frmky
nVidia Tesla V100 with now old CUDA code that...

nVidia Tesla V100 with now old CUDA code that only supports 64-bit vectors
1h 26m
Forum: Msieve 2021-05-09, 22:24
Replies: 41
Views: 21,312
Posted By frmky
One node with 2 x Cavium ThunderX2 CN9980 32-core...

One node with 2 x Cavium ThunderX2 CN9980 32-core 64-bit ARM cpus and DDR4 memory.

VBITS = 64 2h 57m
VBITS = 128 2h 1m
VBITS = 256 2h 2m
Forum: Msieve 2021-05-09, 20:16
Replies: 41
Views: 21,312
Posted By frmky
common/lanczos/cpu/lanczos_cpu.h:#define...

common/lanczos/cpu/lanczos_cpu.h:#define MAX_THREADS 32
Forum: Msieve 2021-05-09, 08:57
Replies: 41
Views: 21,312
Posted By frmky
Each node has a Fujitsu A64FX 64-bit ARM...

Each node has a Fujitsu A64FX 64-bit ARM processor with 48 cores and 32 GB HBM memory divided into 4 NUMA regions.

VBITS = 128
1 node 3h 30m
2 nodes 1h 58m
4 nodes 1h 10m
8 nodes 0h 41m
...
Forum: GPU Computing 2021-05-09, 02:56
Replies: 20
Views: 758
Posted By frmky
Are you cooling it? Tesla cards often don't have...

Are you cooling it? Tesla cards often don't have a fan installed and require a high-speed fan to keep it cool.
Forum: Factoring 2021-05-06, 01:28
Replies: 957
Views: 104,589
Posted By frmky
Yes, I think so. Along with computing resources...

Yes, I think so. Along with computing resources to complete both the sieving and linear algebra.
Forum: Factoring 2021-05-05, 18:49
Replies: 957
Views: 104,589
Posted By frmky
Here's the log for posterity. ziQFbDHJ

Here's the log for posterity.

ziQFbDHJ
Forum: NFS@Home 2021-04-30, 18:42
Replies: 40
Views: 6,908
Posted By frmky
Yes, that's an option. The relations are still...

Yes, that's an option. The relations are still available and valid. You will likely have about 1/2 - 2/3 of the jobs below the leading edge done. You can start sieving at 75M or so and extend at the...
Forum: Homework Help 2021-04-21, 21:01
Replies: 39
Views: 4,054
Posted By frmky
This time, n^2+1 with n =...

This time, n^2+1 with
n = 45083353343605571545533410947717135106897526776420892595434169982645626140823520
I see this is already factored, but please don't do these for him. It appears that he has...
Forum: Homework Help 2021-04-09, 07:50
Replies: 39
Views: 4,054
Posted By frmky
It looks like you are perhaps trying to factor...

It looks like you are perhaps trying to factor this number?
33765749444723236975938383549571694531728722961303548619829414070181324100^2+1
Forum: Hardware 2021-04-09, 00:08
Replies: 5
Views: 467
Posted By frmky
Yes, in my experience most cluster systems are...

Yes, in my experience most cluster systems are built on a Red Hat-based distro. Although it looks like Rocks hasn't been updated in a while, and the community appears to be moving to OpenHPC.
...
Forum: Hardware 2021-04-08, 07:00
Replies: 5
Views: 467
Posted By frmky
I haven't tried this in quite a while, but when I...

I haven't tried this in quite a while, but when I built my own small clusters I used Rocks (http://www.rocksclusters.org/). That configures IB out of the box, as well as MPI supporting IB, a...
Forum: Science & Technology 2021-04-07, 05:37
Replies: 227
Views: 14,304
Posted By frmky
My actual kid is my biggest concern now. All of...

My actual kid is my biggest concern now. All of the adults in my immediate family have had both shots. I know outcomes for children are good but worry about currently unknown longer term effects.
Forum: Aliquot Sequences 2021-04-03, 18:19
Replies: 991
Views: 108,518
Posted By frmky
2747460 at i2916 merges with 1553820 at i7.

2747460 at i2916 merges with 1553820 at i7.
Forum: Aliquot Sequences 2021-03-30, 19:25
Replies: 11
Views: 859
Posted By frmky
Ah. So simple. Thanks!

Ah. So simple. Thanks!
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