Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 401: | \[{8^{401}-1\over7}\] | 19249 × 856971565399<12> × 2136958965524920285681<22> × 6036176514733205313599139320239<31> × 594538100848945223169882301931953<33> × 428209191776225441650116035809142521<36> × 157563584396809246533896922588809084010469249304497<51> × 4743358775443804666040010704534780418840545962266329593<55> × 486045068755637290407709222721577342903730800431975888964190032985002107524203936404084278917377403908409637849120908193<120> |