Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
139: | \[{13^{139}-1\over12}\] | 62895574665131573770495625630815229<35> × 91269282217570166751740573753780634136260652238109789548046099040901085315238558606737946647588987218610535919884928987<119> |