Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
191: | \[{5^{191}-1\over4}\] | 112691 × 60426671 × 1169749680244912326138211518173648104342708417321462088878770777077018070874770315901989031997671838650855091818008950671<121> |