Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 490: | \[{7^{490}-1\over6}\] | 23 × 11 × 29 × 71 × 113 × 191 × 197 × 421 × 491 × 883 × 911 × 2801 × 3529 × 3823 × 4733 × 12251 × 161309 × 1074473 × 1445599 × 12128131 × 13473433 × 19847549 × 20632921 × 101361401 × 603926681 × 2127431041 × 4896864001<10> × 9152363081<10> × 77192844961<11> × 11492120512321<14> × 648128907712931<15> × 6106505825833677713<19> × 353207957997402826578121<24> × 11193638545408118035815864041<29> × 13454548201145619522981465181<29> × 781908100419579320656842933424612860491758000036325298991<57> × 52070081841475904567260997685175416097683265543655928045420233374044085650782246643281<86> |