Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 552: | \[{28^{552}-1\over27}\] | 3 × 5 × 13 × 29 × 47 × 139 × 157 × 271 × 277 × 757 × 1657 × 3313 × 7039 × 7321 × 47221 × 76913 × 614657 × 893413 × 4136689 × 51605161 × 94369507 × 115152031 × 13675021313<11> × 140668620541<12> × 255595103341<12> × 4099849287367<13> × 224727078564911869<18> × 452369327439935809<18> × 7353697549144438330337<22> × 6013890309283753610697077<25> × 47053076058432028334466875017<29> × [1365027900134595985801076790320864892048242300672234581848775345676417654973254734578128529339567785478909471172815559109492420120965559390954479323883804565247407193188674637426155070018032224048613551002380061346632121623273746278053443194627201672715034541892576752591692604204767210390030911881258850774610971351113326148378271142692255285019726041414626850622802329787561878490111196356113342669585184643115000962488919876682960475268949521605592716316721247200096832750534827843918588783744629824738557818310189270616553001704041606598932573498148350217<559>] |