Before trying the problems "note your opinion as to whether the observed pattern is known to continue, known not to continue, or not known at all."
Is 7013*2n+1 always composite?
Is 78557*2n+1 always composite?
(In reply to re: Does it continue?
You should avoid posting answers to problems in the queue before they are posted.
Posted by Math Man
on 2017-09-23 19:36:03