Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 37: | \[{31^{37}-1\over30}\] | 149 × 4219 × 152597832677<12> × 257803457371<12> × 386626708057<12> × 52812493022953<14> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 37: | \[{31^{37}-1\over30}\] | 149 × 4219 × 152597832677<12> × 257803457371<12> × 386626708057<12> × 52812493022953<14> |