Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 262: | \[{18^{262}-1\over17}\] | 19 × 263 × 535529 × 4937129 × 583611289 × 83265325271<11> × 5429089043897<13> × 59305632978486649450720615586460322077911114394209<50> × 798745172959415696032317403216661106058706840191203912192586967699963207<72> × 27112001123963612363302240386302730590299155358291262370746426887419374005385194263903616806053624337341176945435177983730725196951971139343519576598626826083<158> |