Does anyone see a need to keep the -j option around in pfgw? I'm asking because pfgw executes the same gwnum routines as if testing -q2^<exp>-1. There are...
2264
Phil Carmody
thefatphil
Nov 15, 2011 9:54 am
... Precisely none, for the reasons you so clearly state. Phil...
2265
Mark Rodenkirch
mgrogue
Nov 16, 2011 12:43 am
Changes from 3.5.5 (3.5.6 was unofficial): 1) Added prevprev() function 2) Fixed ABC2 file with primes from option 3) Fixed issue when providing an argument...
2266
djbroadhurst
Dec 23, 2011 2:53 am
... Will there be a linux v3.6.0? If so, how will it differ from v3.5.7? David...
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Mark Rodenkirch
mgrogue
Dec 23, 2011 3:54 am
There will be, but I haven't officially released it yet. There is a second change WRT the usage of number_primes in ABC files. Through 3.5.7, if you stop and...
2268
Mark Rodenkirch
mgrogue
Dec 23, 2011 3:55 am
BTW, by "released"; I mean that I haven't made it the official Windows build via source forge and I have not announced it. --Mark...
2269
djbroadhurst
Dec 23, 2011 4:18 am
... Everything seemed to me to be in the "release" category. For example my version of pfgwdoc.txt is headed ... and release.txt says that all these are...
2270
djbroadhurst
Dec 23, 2011 4:37 am
... David (unstable, as per usual)...
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mgrogue@...
mgrogue
Dec 23, 2011 2:13 pm
... I see what you mean. When is says "Release", that typically means that the software was released. It doesn't mean that the software has a status of...
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Mark Rodenkirch
mgrogue
Dec 30, 2011 5:55 pm
You can find it here: The changes are: - Upgraded Windows biulds to use MPIR 2.4.0 and renamed header to mpir.h, not wingmp.h - When using the number_primes...
2273
djbroadhurst
Jan 13, 2012 10:34 pm
... Thanks, Mark. 64-bit OpenPFGW 3.6.0, with gwnum 26.6, worked well for finding and proving this 275495-digit palindromic prime: PFGW Version...
2274
djbroadhurst
Mar 29, 2012 6:04 pm
... I see that this has now happened: PFGW Version 3.6.3.64BIT.20120316.x86_Dev [GWNUM 27.5] Is it expected that OpenPFGW will be free of the problems that LLR...
2275
mgrogue@...
mgrogue
Mar 29, 2012 6:09 pm
... Yes. --Mark...
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mgrogue@...
mgrogue
Aug 21, 2012 8:49 pm
A bug was found that affects 64-bit builds on Windows. It has been around since I first released it, so I'm surprised it hadn't been found. The issue affects...
2277
j_chrtn
Aug 22, 2012 11:10 am
Hello Mark, What are exactly the potential consequences of this bug? In particular, is it possible that an actual prime (or strong probable prime) be declared...
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Mark Rodenkirch
mgrogue
Aug 22, 2012 12:17 pm
... If there were an issue with finding PRPs/primes, I think it would have been reported already. The only known issue is that pfgw will find false factors of...
2279
djbroadhurst
Nov 17, 2012 1:18 am
Just my usual report, for the benefit of George and Mark, that the latest version, pfgw 3.6.6 with gwnum 27.8, still trips up with Phi(13,2^2749)/8191, but...
2280
djbroadhurst
Nov 17, 2012 11:09 pm
... Again for the benefit George and Mark, I give some more MAXERR examples in http://physics.open.ac.uk/~dbroadhu/cert/pfgw_err David...
2281
Mohsen
mafshin89
Nov 28, 2012 1:05 pm
Would you please add an option that output the modular exponentiation result? like this pfwg -me -b2 -q3^8+1 result = 2^(3^8+1) Mod (3^8+1) It can be very...
2282
Mohsen
mafshin89
Nov 28, 2012 1:05 pm
Why I get "Evaluator Failed" on a simple expression like this? 2^(5^33) - Evaluator failed...
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Phil Carmody
thefatphil
Nov 28, 2012 2:44 pm
... This can be done from within a script file, IIRC. Phil...
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Phil Carmody
thefatphil
Nov 28, 2012 2:47 pm
... Because it's too big to store. It's 2^116415321826934814453125, which is more than 10^35044503824783162587990. You simply do not have the memory to store...
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djbroadhurst
Dec 2, 2012 10:04 am
... Yes, indeeed it can. In "scriptfileformat.txt" we find: POWMOD <varnameres>,<varnamebase>,<varnameexp>,<varnamemod> The first parameter will contain the...
2286
Mohsen
mafshin89
Dec 2, 2012 9:59 pm
I usually pre-check my numbers with Mathematica before long test with OpenPFGW. OpenPFGW is quite fast in comparison with Mathematica for modular...
2287
Mark Rodenkirch
mgrogue
Dec 2, 2012 10:16 pm
Yes, it could be made faster. The sieve used for trial division is not optimal. It's on my list of things to do, but I don't know when I'll get around to it....
2288
Mohsen
mafshin89
Dec 2, 2012 10:57 pm
Aren't you going to make OpenPFGW multi-threaded? As of now, when I want to use the whole power of my multi core system I have to copy pfgw exe file to...
2289
Mark Rodenkirch
mgrogue
Dec 2, 2012 11:34 pm
Multithreading pfgw would not be an easy task. It was not written with multi-threading in mind. Some of the problems with multi-threading pfgw include...
2290
Jay Berg
j_m_berg
Dec 3, 2012 9:53 am
I created a shell that invokes PFGW processes and assigns each a task. Once the task finishes the shell adds the results to the end of the central log and then...
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Phil Carmody
thefatphil
Dec 3, 2012 10:25 am
... Does TD use a tree? I know several tree implementations were offered in the past. I'm sure I can find my old one if it's needed. Phil...
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Mark Rodenkirch
mgrogue
Dec 24, 2012 2:01 am
... I should have responded to this earlier. Phil, if you are willing to spend the time, you are free to implement a different sieve. I can add you as a...
