Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 688: | \[{3^{688}-1\over2}\] | 25 × 5 × 17 × 41 × 173 × 193 × 431 × 128657 × 144481 × 470593 × 2291041 × 226519873 × 2641485701 × 55473422113<11> × 903239908009<12> × 21376165893692833<17> × 380808546861411923<18> × 82064241848634269407<20> × 310487139192810277190422659965783670503820001<45> × 29241916907334820616557688889440878559426168577846725809<56> × 1553655622878631109449438944557666202240107456561771155345595254376934158033050009621595769422716913<100> |