Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 148: | \[{31^{148}-1\over30}\] | 26 × 13 × 372 × 149 × 593 × 4219 × 1071373 × 1939097 × 50121089 × 152597832677<12> × 257803457371<12> × 386626708057<12> × 52812493022953<14> × 969963587051157584202299<24> × 488064548082098022956156062559<30> × 144448803773715099122659251615737<33> × 722868290407047064918900179912004222725132684120577<51> |