Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
129: | \[{17^{129}-1\over16}\] | 307 × 1549 × 3075877724153666279633<22> × 1064542861270580708122635671<28> × 714039721116560436536702749090856988792306514801<48> × 30043220921261072773689100636311922685983691251211032369<56> |