Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 688: | \[{9^{688}-1\over8}\] | 24 × 5 × 17 × 41 × 173 × 193 × 431 × 57793 × 128657 × 144481 × 470593 × 2291041 × 21523361 × 226519873 × 2641485701 × 55473422113<11> × 903239908009<12> × 1275197157121<13> × 9441993966241153<16> × 21376165893692833<17> × 380808546861411923<18> × 38495189744338772129<20> × 82064241848634269407<20> × 310487139192810277190422659965783670503820001<45> × 207559527409737613969927087202358711000070985004550657<54> × 29241916907334820616557688889440878559426168577846725809<56> × 6391497281666786260897813852145132751366501900615904106113<58> × 1388239215502726549524438440497854225949903590564939687586177<61> × 8557576957099242495009559114141296270021727435567206452729993567188661094190048885861254257195873<97> × 1553655622878631109449438944557666202240107456561771155345595254376934158033050009621595769422716913<100> |