Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 177: | \[{6^{177}-1\over5}\] | 43 × 1421059369 × 4866979762781<13> × 29050941569087<14> × 11522163007228653937<20> × 1085842578623802835438690280097321534179918997337939580812207878874189620256468939<82> |