... and strikes up a conversation with Aggie The Pew. The alien intelligence announces that it has travelled 40 light years to Earth to grant the answer to three questions.
Aggie is all excited, so he asks "Is 78,557 the smallest Sierpinski number?". The alien answers, No.
Aggie thinks about it for a moment and realizes that there's no proof, so the answer is useless.
So then Aggie decides to make good with the second question. Thinking there will be another EFF prize but not knowing how large the prime must be, Aggie asks for the smallest trillion trillion trillion digit prime number. The alien begins to send it but then Aggie runs out of disk space.
Disappointed, Aggie decides to ask for something he can really use, so he asks for the world's funniest joke. The alien immediately dies of laughter.