These are my Pari progs. They're not much,but they do a lot!
I'm just keeping them in this file so I don't lose them.
I figured this out with trial and error.

Pari is at http://pari.math.u-bordeaux.fr/

Power of 2

for(a=1,16,print(2^a))

Primes of Pow2-1

for(a=1,1024,if(isprime(2^a-1)==1,print("2^",a,"-1=",2^a-1)))

above to file

for(a=1,65536,if(isprime(2^a-1)==1,writetex("File.txt","2^",a,"-1=",2^a-1)))

Primes of Pow2+1

for(a=1,16,if(isprime(2^a+1)==1,print("2^",a,"+1=",2^a+1)))