Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 174: | \[{15^{174}-1\over14}\] | 24 × 59 × 211 × 241 × 349 × 798084409 × 1831362215404162343599<22> × 15476275967141572773889537007699<32> × 798962746803683694452047348022461<33> × 422898670999329030127560498508143815255455759<45> × 2434454875515985938258837058986771053264041318453337821<55> |