Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
173: | \[{13^{173}-1\over12}\] | 347 × 113489 × 481633 × 22647445498229982183500307283402183695202973699221057695327421529872257245099861072879780443562736308635594279799471520294465943224607283375137230582446985192199359637573528268639<179> |