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Search: Posts Made By: J F
Forum: Puzzles 2018-03-31, 01:02
Replies: 218
Views: 59,622
Posted By J F
#20 at 833K digits atm, no PRP. Quick (and very...

#20 at 833K digits atm, no PRP.
Quick (and very rough) approximation that a random pick
with n decimal digits is prime: 1 : 2.3n
Chance to find none between 750K and 1M is around 90%.
Forum: Software 2017-09-17, 17:01
Replies: 18
Views: 3,529
Posted By J F
I did just read (3 weeks late) a threadripper...

I did just read (3 weeks late) a threadripper test in german
c't magazine. They write, in BIOS or with a 'Ryzen Master Tool'
you can switch RAM setup between distributed mode and local mode.
...
Forum: And now for something completely different 2017-07-30, 14:47
Replies: 4
Views: 1,764
Posted By J F
Yay, thanks a lot! Runs out of the box and...

Yay, thanks a lot!
Runs out of the box and produces the same results as pixsieve.
6-year-old HD7950 (Tahiti) @stock 850MHz is ~5x faster than one
6600K core @3.9GHz. I will play around to see if...
Forum: Information & Answers 2017-07-27, 20:28
Replies: 25
Views: 17,041
Posted By J F
Would that bring in more than the other side is...

Would that bring in more than the other side is paying, if I
promise NOT to factor? And what part of that income would I
need to counter the drastically lowered life expectancy?
Forum: And now for something completely different 2017-07-18, 06:55
Replies: 22
Views: 14,912
Posted By J F
Any chance to see that in pixsieve some day?

Any chance to see that in pixsieve some day?
Forum: Puzzles 2017-06-27, 21:53
Replies: 13
Views: 3,247
Posted By J F
Thanks! Well, grab pixsieve and pfgw, and...

Thanks!


Well, grab pixsieve and pfgw, and there you go.
Forum: Puzzles 2017-06-27, 06:38
Replies: 13
Views: 3,247
Posted By J F
'Transcendentalism' shouldn't play a role since...

'Transcendentalism' shouldn't play a role since that, per se,
says nothing about the distribution of digit values (I think).
For that you have 'Normalism'.

Dumb question: is there some sort of...
Forum: Puzzles 2017-06-26, 22:12
Replies: 218
Views: 59,622
Posted By J F
Progress report: #20 somewhere around 750K...

Progress report: #20 somewhere around 750K digits, no PRP yet
Forum: GpuOwl 2017-05-08, 23:05
Replies: 2,734
Views: 315,597
Posted By J F
Only a quick test, seems to work with a 7950...

Only a quick test, seems to work with a 7950 under Win7 - has only 850MHz and
OpenCL 1.2, but is one of the good old things with SP:DP ratio of 4:1.

gpuOwL v0.1 GPU Lucas-Lehmer primality...
Forum: Software 2017-05-05, 15:35
Replies: 69
Views: 7,352
Posted By J F
Windows yes, other OS I don't know. Depends on...

Windows yes, other OS I don't know. Depends on the tool used, I guess.
Adds ~150KB for the wrapper/decompressor.
Forum: Software 2017-05-05, 09:47
Replies: 69
Views: 7,352
Posted By J F
If you worry about download size, you could offer...

If you worry about download size, you could offer a better
compression alongside the current .zip.
5.618.832 byte: p95v2810.win64.zip from download
1.302.170 byte: LZMA2 (.7z)
The 55.4MB test...
Forum: Cloud Computing 2017-03-29, 12:47
Replies: 154
Views: 23,460
Posted By J F
Usually that is far less than 1:1. Simplified...

Usually that is far less than 1:1.
Simplified example: 150W heat from a PC (100W CPU + RAM + board + HD, no extra
GPU) is 'cooled' with two 6W fans, (CPU+case), overhead 8%, or PUE (power usage...
Forum: Puzzles 2017-03-25, 09:44
Replies: 218
Views: 59,622
Posted By J F
What is 'anomalously large'? You can approximate...

What is 'anomalously large'? You can approximate the probability
that the sequence from a starting value will yield no prime up
to some digit count. The chance to 'survive' to 300K digits is
order...
Forum: And now for something completely different 2017-03-19, 16:47
Replies: 27
Views: 5,942
Posted By J F
*scratch head* I don't unterstand these numbers. ...

*scratch head* I don't unterstand these numbers.
5+ hours for a test at this range sounds like
something older, maybe slow 1st-gen AVX.
Assuming >2K numbers per 100K range after sieving
gives...
Forum: Lounge 2017-01-26, 16:03
Replies: 19
Views: 3,584
Posted By J F
Maybe we get one of this: ...

Maybe we get one of this:
http://peopleinwhitecoats.blogspot.de/2015/05/how-sharper-than-serpents-tooth-is.html
Forum: Hardware 2017-01-24, 11:21
Replies: 8
Views: 1,286
Posted By J F
If that machine has been running 24/7 for the 3...

If that machine has been running 24/7 for the
3 1/2 years, especially with overclock, it
could be just 'announcing end of life' - thermal
stress, electromigration, capacitor 'wear' and
such...
Forum: And now for something completely different 2017-01-20, 10:13
Replies: 27
Views: 5,942
Posted By J F
#44 no PRP up to 125K. I now go back to my pet...

#44 no PRP up to 125K. I now go back
to my pet with one letter less.
Forum: Hardware 2017-01-19, 02:48
Replies: 17
Views: 2,537
Posted By J F
If I remember this correctly: only the Z-series...

If I remember this correctly: only the Z-series chipsets have
features that allow the user to change VCore, multipliers and
other stuff needed to over-/under- -clock/-volt K-processors.
Board...
Forum: And now for something completely different 2017-01-18, 14:16
Replies: 27
Views: 5,942
Posted By J F
#44 nothing up to 100K

#44 nothing up to 100K
Forum: And now for something completely different 2017-01-16, 11:14
Replies: 27
Views: 5,942
Posted By J F
Now that was quick. #70 7399 digits #76 7045 ...

Now that was quick.
#70 7399 digits
#76 7045
#92 2692
#44 on its way to 100K, off to work,
lets see what we have tonight.
Forum: And now for something completely different 2017-01-16, 09:33
Replies: 27
Views: 5,942
Posted By J F
#15 4050 digits, #44 nothing up to 15K. (modulo...

#15 4050 digits, #44 nothing up to 15K.
(modulo me messing something up)
I will do some more later.
Forum: Lounge 2017-01-12, 23:15
Replies: 19
Views: 3,584
Posted By J F
In your scenario, robot and human evaluate a...

In your scenario, robot and human evaluate a given situation differently.
You seem to assume that the human is right, but what if he isn't?
Option to override means changing order of rule 1 and 2;...
Forum: Software 2016-12-16, 22:37
Replies: 508
Views: 101,541
Posted By J F
The new version also seem to fix the bug with...

The new version also seem to fix the bug with decimal
format 'Length is beyond length of decimal on line 1Length...'

Thanks!
Forum: Puzzles 2016-10-16, 13:23
Replies: 218
Views: 59,622
Posted By J F
First hit with the new machinery. #861, 279430...

First hit with the new machinery.
#861, 279430 digits PRP.
Forum: Puzzles 2016-10-12, 19:18
Replies: 218
Views: 59,622
Posted By J F
With the help of pixsieve (thanks again, rogue!)...

With the help of pixsieve (thanks again, rogue!) and
a new 6600K its now 5-7x faster than my old machine.
Enthusiasm rekindled, chugging along.
#20 is approaching 600K and the other 8 unfinished...
Showing results 1 to 25 of 56

 
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