i'm going to collect all primes of Riesel power of 2-bases on the data pages of

http://www.rieselprime.org/.

the first one is k=17135: i tested this k upto n=100k (17 primes) and marked n=78064 with a comment "Riesel base 16 prime: 17135^16^19516-1" (mouse cursor over red star).

see here:

http://www.rieselprime.org/Summary10e04.htm#n04.1
more to come and an extra pages with all those primes too.

karsten