Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 91: | \[{19^{91}-1\over18}\] | 599 × 701 × 29251 × 70841 × 133338869 × 111372552514164781899670710272036735926703976961131660860368530051797634505591051484642574481<93> |