Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
171: | \[{18^{171}-1\over17}\] | 73 × 991 × 6841 × 34327 × 40027681 × 1288363483639<13> × 6089884909802812423<19> × 109030539183149105839<21> × 1135070056132121343004681823047441<34> × 850055902813968541409600883736115090563046973702148574915582901003301985930964971268843955736958978138704311<108> |