Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 236: | \[{18^{236}-1\over17}\] | 52 × 13 × 19 × 709 × 7907 × 206510149 × 4295428888967<13> × 128998224914431<15> × 312278175742409<15> × 5324131927614977<16> × 39128840454084865858255640571151<32> × 4187430229937555881640575617973891672467819179669<49> × 766147628007216704407313006855253474763752903066750740186891996861801<69> × 12487865530911162759381995764227546413079665446717472503970407973379073<71> |