View Single Post
Old 2018-09-09, 03:52   #2
Citrix's Avatar
Jun 2003

1,553 Posts

For k*b^n+-1, I think you are talking about fixed b and n and variable k?

Some of this is randomness involved with distribution of factors.
When n has a lot of small factors and k is a power then they could have a factor.

e.g. 4*5^10-1 will have factors 2*5^5+1 and 2*5^5-1
Citrix is online now   Reply With Quote