> According to Guy's Unsolved Problems... a Cullen number is one of the
> form n.2^n + 1. What is "a generalized Cullen prime"?
Dear Avinoam,
In the "Prime Glossary" (entry: Cullen Numbers) we read:
<q>
Finally, a few authors have defined a number of the form n.b^n+1 with b not 2,
to be a generalized Cullen number, so any primes of this form could be called
a generalized Cullen prime.
</q>
http://www.utm.edu/research/primes/glossary/Cullens.html
The "Prime Glossary" is a very good on-line guide to the prime number
terminology, with many historical information. The founding editor is
Chris Caldwell.
URL: http://www.utm.edu/research/primes/glossary/glossary.htm
Greetings from Athens
Antreas