Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 427: | \[{7^{427}-1\over6}\] | 29 × 367 × 4733 × 4759 × 177237331 × 165649067659909<15> × 1914662449813727660680530326064591907<37> × 88952702490595635991855959382190206705908963141045359599648016164505006377256389546604468634931539182920809346771675977350641663224294863867051052346233030427810898136941739219820721028101575412408557361442276136896624104233015356089640174996978462560103065338025939666322591200406677474989<290> |