I installed it a few weeks ago from the link in the wiki to the most recent
stable version.  If I click on “about” in jqt , it says…

Engine: j903/j64avx2/windows

It said the beta was for “adventurous users.”

Should I be running a different one?



On Thu, Feb 16, 2023 at 3:01 PM Elijah Stone <elro...@elronnd.net> wrote:

> What version of je are you running?  I get innocuous results:
>
>     genkey 32
> 15970092203996114281 4061548213 3932020837
>     genkey 32
> 14979749644274477941 4038627851 3709118591
>     genkey 32
> 15125320685289546439 3974107847 3805966337
>
> If you are not running the latest beta, I suggest doing so; among other
> things, support for extended-precision numbers was much improved.
>
> On Thu, 16 Feb 2023, Mike Duvos wrote:
>
> > I wrote a brief J script to generate random RSA keys in various
> lengths.  I
> > put a copy in my Dropbox at the following URL…
> >
> > https://www.dropbox.com/s/0y0tpgtjtv4vvd2/rsakeys.ijs
> >
> > In this script is a function called “genkey” which crashes J.
> >
> > genkey =: 3 : 0"0
> >
> > q =. p =. randprime y
> >
> > while. q = p
> >
> > do.
> >
> > q =. randprime y
> >
> > end.
> >
> > if. p < q
> >
> > do.
> >
> > 'p q'=. q,p
> >
> > end.
> >
> > (p*q),p,q
> >
> > )
> >
> > randprime y returns a random prime of length y bits with the upper two
> bits
> > set as an extended precision integer.  It seems rock solid and has been
> > called millions of times without issue.
> >
> > genkey picks a prime, p, and another prime not equal to it, q, and swaps
> > them if necessary so p is the larger one.  It then returns a vector of
> > length 3, consisting of p*q, p, and q.
> >
> > If you load this script, and type “genkey 32”, you get a “J has stopped
> > working, reporting to Microsoft” dialogue box immediately.
> >
> > If I write another function, “keygen” which does the same thing as
> genkey,
> > but phrased slightly differently, it works perfectly.
> >
> > keygen =: 3 : 0"0
> >
> > z =. ''
> >
> > while. 2 > #z
> >
> > do.
> >
> > z =. ~. z , randprime y
> >
> > end.
> >
> > (*/z),\:~z
> >
> > )
> >
> > keygen 5#32
> >
> > 13636890702424146503 3697445573 3688192411
> >
> > 14042631972443509627 3975272443 3532495489
> >
> > 15856784938324374101 4290006247 3696214883
> >
> > 12482175669738327193 3743048207 3334762199
> >
> > 14012721502477771067 4146478969 3379426643
> >
> >
> > I’m new to J programming, so I’m sure I’ve just done something dumb.  Any
> > insights would be appreciated.
> >
> > Thanks.
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm

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