Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 620: | \[{7^{620}-1\over6}\] | 24 × 53 × 11 × 191 × 281 × 311 × 373 × 2801 × 4021 × 5581 × 12401 × 21143 × 21391 × 21701 × 60761 × 6689491 × 9754399 × 10851241 × 66185621 × 730302341 × 1622982371 × 9254997611<10> × 33947629297<11> × 136823162401<12> × 92105555489371<14> × 5420506947192709<16> × 187764647774645561<18> × 3999088279399464409<19> × 74502648768583254173<20> × 196846325409292090901<21> × 6738994821559541056661<22> × 18127525360389024220391<23> × 569137141964300277257759320744141368811<39> × 55695322897024897423993821611398538193323794771141198989530564711821<68> × 148276864286443536645390039465132426339719815626014718724818051840761<69> × 31728015189946773062954921268435825250349092899077924422648569887851893731<74> |