Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 116: | \[{28^{116}-1\over27}\] | 5 × 292 × 59 × 157 × 233 × 349 × 40427 × 1074509 × 708359326721<12> × 25404189355843522469778697943<29> × 582595509837473004489665028935473297399<39> × 19048518175335748746037009367532568856946855016441696044225927517<65> |