[jasong]

It seems very likely like 14*8^n-1 is composite for all n. NewPgen says it's composite for all n up to 50,000,000.

Edit: Reserving 92*17^n-1

Edit: 92*17^4-1 trivially factors prime!: 7683931

could there be typos in that message?

Edit: reserving 4*9^n-1(yes, I know, I'm editing like crazy.)