Formal target: Corpus.WikipediaPell.infinite_pellNumber_primes
There are infinitely many prime Pell numbers
Exact formal statement
Infinite.{1} (Set.Elem.{0} (Set.ofPred.{0} fun n => Prime.{0} (Corpus.WikipediaPell.pellNumber n)))This target is a formal statement, not a proof of the problem.
Environment availability: available.