Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 187: | \[{18^{187}-1\over17}\] | 17 × 23 × 199 × 12343 × 16127 × 51217 × 2256343 × 188193809 × 279084170477311<15> × 7563707819165039903<19> × 84688124912529896476569181570824417302559780435315045751<56> × 5318489792041762806549073636257508552021068757693442928768584815082574458802811950104256348144716907830270120951<112> |