Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
109: | \[{18^{109}-1\over17}\] | 223795967 × 163382228315181914965513289<27> × 107447685280516359778741119907177002168028417976636782583096917794952275008161692632021392116814838377<102> |