Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 630: | \[{21^{630}-1\over20}\] | 2 × 5 × 11 × 19 × 31 × 37 × 43 × 71 × 127 × 199 × 211 × 337 × 421 × 463 × 613 × 631 × 1471 × 2521 × 2551 × 3319 × 4789 × 6427 × 9391 × 18181 × 20161 × 40841 × 51787 × 140351 × 185641 × 501001 × 516349 × 658261 × 734329 × 4149601 × 20028751 × 41489011 × 57815101 × 78555121 × 81090871 × 81867661 × 85775383 × 227633407 × 3987476221 × 16128844201<11> × 22125429901<11> × 22864311556633<14> × 27186384126763<14> × 421503321597121<15> × 4527391635851869<16> × 22554946693833031<17> × 72413241922093801<17> × 100595851688887003<18> × 667866235603160161<18> × 231877932177836345689<21> × 5124240195826801224421<22> × 9836871692461559260201<22> × 10525167031997580149881<23> × 268004127903031206150241<24> × 1855106691418101398774071<25> × 32071033873519074932758681<26> × 82207575664095002495707981<26> × 2786075704682014347850474897520467137424864381<46> × 16942945002479451136849012280433143164227240727021<50> × 22992462429148755837481956896925474251778386308301256361<56> × 50503414131750026360607962741146737336576540383240033564249673712598469361<74> × 65905326112538087859370066574780956755259359465410354740062841628535328585142082545232567001<92> |