Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 165: | \[{28^{165}-1\over27}\] | 3 × 31 × 199 × 271 × 15991 × 637421 × 734941 × 2054581 × 6077039 × 50545507 × 16071033331<11> × 829366011211<12> × 94275090945167441<17> × 5906633396655970661<19> × 38681906982937869421<20> × 75223260922213952461<20> × 425141076149786955572181811<27> × 4554890187723982098962291325301<31> × 2256086536806735559873959953740573846381<40> |