Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 420: | 22 × 5 × 11 × 13 × 17 × 29 × 31 × 41 × 43 × 61 × 71 × 211 × 337 × 421 × 463 × 631 × 1471 × 2551 × 3181 × 3319 × 3697 × 4789 × 6427 × 9391 × 18181 × 18481 × 20161 × 40841 × 50261 × 140351 × 185641 × 501001 × 1360861 × 4149601 × 4325861 × 20028751 × 78555121 × 81090871 × 81867661 × 227633407 × 920421641 × 2616115321 × 3987476221 × 16128844201<11> × 68454248717<11> × 92152520881<11> × 22864311556633<14> × 421503321597121<15> × 1053606939618901<16> × 72413241922093801<17> × 6474775133349148921<19> × 5124240195826801224421<22> × 268004127903031206150241<24> × 1855106691418101398774071<25> × 32071033873519074932758681<26> × 2934413293238858072198024161<28> × 146453218893643838406593856001717939447081<42> × 2260473771611723850539339307597381961827361<43> × 223350831204005812096551453858328614600333005863090350961<57> |