Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 381: | \[{18^{381}-1\over17}\] | 73 × 2287 × 3049 × 41911 × 63659767 × 476505017 × 11366990729<11> × 44818659041360657<17> × 10002817383964383858272564534650482868779857031826948137888054981068189683389017610552184521565703875426253187714329<116> × [68892280941547784795302438026489597261335848632766442020811595293382225535400690969320102420232727040917677077776944578160346012004231862139155521032352484876562552150922228373889505245672415079096369426067985933994829031791568172329268689657536315697076506811770425387131574053852516750384339207611002343<305>] |