Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 375: | \[{7^{375}-1\over6}\] | 3 × 19 × 31 × 251 × 2551 × 2801 × 29251 × 159871 × 8668167751<10> × 31280679788951<14> × 2182816753758823696751<22> × 7518480999776007258001<22> × 217648180992721729506406538251<30> × 5903546678356844440204179342119473011887617239565323800435501<61> × 9749495229710098497186543870986809880214868507743932200504888128751<67> × 16465254873874489290010528135619907554748347604598547658544089997533001<71> |