Re: Using Python with PARI/GP questions

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

On Sat, Nov 02, 2024 at 07:48:16AM +0100, hermann@stamm-wilbrandt.de wrote:
> Five days ago I published my first challenge with price money (100 USD):
> https://github.com/Hermann-SW/RSA_numbers_factored/tree/main/1_sum_of_2_sqs_semiprime
> 
> To make it impossible for me to know the random seed used,
> I used Python time.time_ns(), epoch time at nanosecond resolution.
> 
> To make it impossible for everyone else, I did input a long
> factor with stdiomask.getpass() that was used as well.
> 
> pi@raspberrypi5:~/RSA_numbers_factored/1_sum_of_2_sqs_semiprime $
> ./challenge.py
> factor: ****************************************************
> 1
> 1
> 4675966568241743081873479921415404781226665419569548210315782648657034701192057386949090276633929520980704940531187630512099300307
> 15512340356624619735725710103759797813121190798562361321728468720849205060936899989010233224533248153329173333001037083787589728422
> 262497366687079298365523922947227261835640624571224693166902778465021817904092516082216927109476590103573107044406347695971527079161864485154522005142837118124732638711372016122621735436807398062028290119971297328351792353815685809546983240652624562758684904333
> 261 decimal digits semiprime
> pi@raspberrypi5:~/RSA_numbers_factored/1_sum_of_2_sqs_semiprime $
> 
> 
> Questions:
> 
> A)
> GP has (clear text) input(). Is GP equivalent of Python stdiomask.getpass()
> that outputs asterisks instead of typed characters available?

Well, you can do this
system("stty -echo");pass=input();system("stty echo");

> B)
> getabstime/gettime/getwalltime return milliseconds. Is there a GP option
> with more resolution like Python time.time_ns?

No, though internally pari_timer stores microsecond, so in C you can get
microsecond.

> C)
> If having to use Python for asterisk input with PARI/GP for computation,
> what is better?
> 1) call PARI/GP script from Python with os.system() and pass information via
> environment variable (which I did)
> 2) call Python using extern() or externstr() from PARI/GP

I would say it depends on your security profile.

Cheers,
Bill