Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
151: | \[{18^{151}-1\over17}\] | 406249039793<12> × 78373400333814916269683486438417885224418718983258911361<56> × 194417769489944940386335408155252347659053233827877641423<57> × 33419685288459093210723908887937418952602336889976364698997353617<65> |