Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 423: | \[{5^{423}-1\over4}\] | 19 × 31 × 829 × 5844169 × 177635683940025046467781066894531<33> × 16286160623917663079467944573580125726889931566772922392814390121<65> × 39572332202385740741222289075450046633403426658269930807344301678241999541<74> × 35327969662283637841366754184119938798734387168231419369200051153403910044415327994112053319927546540566905718669<113> |