Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 83: | \[{22^{83}-1\over21}\] | 167 × 4265375977 × 317071557863727460379<21> × 207261370941530694105151<24> × 2682339659054597999251067065468909966475494424622654137<55> |