Proposal to extend primes()

[Jeroen Demeyer <jdemeyer@cage.ugent.be>]

Hello pari-dev,

I propose to have a 2-argument version of primes() such that primes(a,b) 
would be equivalent to the current primes([a,b]). Moreover, we could 
make the first argument optional and make primes(,n) equivalent to 
primes(2, n) and return the list of all primes <= n.

What do you think? Implementing this is easy: add a new function 
gp_primes() checking the arguments and calling either primes0() or 
primes_interval().


Cheers,
Jeroen.