Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 215: | \[{6^{215}-1\over5}\] | 5 × 173 × 311 × 431 × 1291 × 7383359 × 19660072438421<14> × 1048953903129961695599<22> × 1761056609541952467493882686215859960449808974052469813809887556763881874991754289289623511450639922730492438351661<115> |