Erdős problem 1113
Erdős Problem 1113. Do there exist Sierpiński numbers that possess no finite covering set of primes?
Sources
FormalConjectures/ErdosProblems/
1113.lean
Retained formal statement
Sierpiński [Si60] proved that there are infinitely many Sierpiński numbers, using covering systems to construct suitable covering sets for any satisfying a certain congruence.
{k | k.IsSierpinskiNumber}.InfiniteSolvedStatement only, no proof