Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 181: | \[{19^{181}-1\over18}\] | 3259 × 17377 × 228061 × 1856906464287495109205730619<28> × 6595216450990718328295077158197768405459852170512029110861960447235419628842966971728916692697497294049658874747374343094470772814100057814769083652514492859329195343577173910151559633155573<190> |