Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 74: | \[{23^{74}-1\over22}\] | 23 × 3 × 593 × 1925658337781<13> × 10445744467953088708693<23> × 1628263171508931784019729<25> × 5713839242138307627889538424597962861<37> |