Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 206: | \[{18^{206}-1\over17}\] | 19 × 19777 × 9470233 × 513473199237485886299<21> × 16327518523053828584399<23> × 9780184826774860381450393<25> × 15936754604932361311519937275763087<35> × 45389141819352957544804393124260351466111752327<47> × 1074671091048646458744859921526383971416973871298271485388303816197666398013914561077986864389673<97> |