Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
206: | \[{5^{206}-1\over4}\] | 2 × 3 × 3709 × 28429 × 59117897713198738371603984809<29> × 39546955636451768643571562540114219<35> × 164346021921044126127443451100580464515251340647713125993808110555013021<72> |