Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 261: | \[{17^{261}-1\over16}\] | 19 × 59 × 307 × 523 × 7193 × 8179 × 16879 × 17749 × 1270657 × 6088087 × 6434173 × 37286983 × 52627759112497<14> × 60842526342751<14> × 45463789934905460941<20> × 11658852700685942029849<23> × 5340455877669348272609426509595308057<37> × 1643580148226728863882299984797694483771305771484717187126392013458338363412358792697784033728257037262863825660151997337731173852396273671452289212729325282236763<163> |