Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
50: | \[{19^{50}-1\over18}\] | 22 × 53 × 11 × 101 × 151 × 911 × 1601 × 2251 × 6451 × 79151 × 127051 × 747596648084101<15> × 36035657195482151<17> |