Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 68: | \[{22^{68}-1\over21}\] | 5 × 23 × 97 × 103 × 137 × 239 × 108461 × 74729519 × 128000923 × 1594728827 × 176634767651<12> × 83436447569696846137157887090522121537<38> |