Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 660: | \[{7^{660}-1\over6}\] | 24 × 3 × 53 × 112 × 13 × 19 × 23 × 31 × 43 × 61 × 67 × 181 × 191 × 281 × 331 × 661 × 1123 × 1409 × 2311 × 2801 × 2861 × 3631 × 4021 × 7591 × 29569 × 32561 × 38501 × 159871 × 293459 × 543841 × 1532917 × 2784937 × 2864401 × 6568801 × 10746341 × 12323587 × 678240817 × 36647640811<11> × 83960385389<11> × 87130088761<11> × 555915824341<12> × 951113761291<12> × 2131954692121<13> × 83723745489451<14> × 116320403133001<15> × 1357105535093947<16> × 7840815905526451<16> × 47045037529563701<17> × 539555593782065191<18> × 1946951063386221338821<22> × 827988114476563498913071<24> × 87055474380291744025754954110081<32> × 5457586804596062091175455674392801<34> × 333454593058084131005955539821528621<36> × 17354646292501032302607529755465814241<38> × 25997604928365519903286127892204746804549580945085749807569777013399466127701<77> |