Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 315: | \[{18^{315}-1\over17}\] | 74 × 31 × 41 × 71 × 127 × 449 × 601 × 631 × 991 × 2143 × 2711 × 3361 × 26881 × 34327 × 65521 × 80207 × 557551 × 558721 × 1292257 × 4274201 × 50451031 × 156107192084257<15> × 6391293850256281<16> × 4164889456901862302881<22> × 65081321032032689150122343401<29> × 1338029376807245057016053427001<31> × 6974796889885559915764172408527<31> × 11128054040802206262613172268430013845441<41> × 3589222000838854349827590588213159330706083481<46> × 3937590470703080225010295409036288392329732372788097478097670301390128133717978837711<85> |