Package: pari-stable
Version: 2.5.5
 
Am very new to PARI.  Have encountered what I believe is a bug in pari-stable (and pari, v. 2.6.1 as well).
 
Running the function factorint(2^521+2^3-1) this function appears to hang.  This was discovered by setting debug to 4 and watching the sequence of operations.  A photo is attached showing this.  When dsn reaches 72 it never increases -- just repeats.
 
An unrelated problem is that when running either version on my laptop under Windows 7 (Intel Core I5), it is indicated to be a 32 bit version.  I expected a 64 bit version.  I'm confused!
 
Do look forward to your response.
 
Sincerely,
 
Hubert Hagadorn