Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 352: | \[{7^{352}-1\over6}\] | 27 × 52 × 17 × 23 × 89 × 353 × 661 × 1123 × 1201 × 1409 × 8713 × 169553 × 293459 × 10746341 × 47072139617<11> × 83960385389<11> × 2085729338353<13> × 8206973609150536446402438593<28> × 19435028227333954653583028029666713381693181003335224017<56> × 1643184774938122413442896727838243678012171716155015359387626042966739853361326634399706424861133828387597650692221131153628111276848001<136> |