help with Pari

[Hans Havermann]

Edwin Clark:

> Maple's isprime is a probabilistic primality test, but there are no 
> known
> counter-examples. So if this number is not prime, it would be somewhat 
> of
> an event. I don't know what Mathematica's PrimeQ is?

Ditto for Mathematica. However, in Mathematica's NumberTheory add-on, 
there's a ProvablePrimeQ that also generates a certificate. And yes, 
the number is provably prime.