Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 212: | \[{28^{212}-1\over27}\] | 5 × 29 × 107 × 157 × 220187971 × 2336285687 × 309617974423<12> × 51896704369906982166374374981930109070398379130537<50> × 22296760665788211056355688793755535283785281059280783<53> × 8418181933268901359893212846689066832649574728174313094689465758991<67> × 61481136373307776861603205726015198034027795647322954146518956510499685404230937872394454359695608329<101> |