Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 271: | \[{7^{271}-1\over6}\] | 6780421 × 164514887 × 127962646077173632312199483013809163214497588966415507177987147170392729827682423052701976465899731717<102> × 12270789827436878734942569699415268721917326227004457742001668161532838127822588253081239300950793542259349049223<113> |