[jinydu]

Originally Posted by Citrix

MMn= 2^(Mn)-1

Based on http://www.primepuzzles.net/conjectures/conj_015.htm
if MMn is prime then 2^(Mn)+1/3 will also be. So can we try factoring 2^(Mn)+1/3? Has any work been done on this?

Citrix

Well, it's a conjecture. It hasn't been proven yet...