Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 462: | \[{21^{462}-1\over20}\] | 2 × 112 × 23 × 43 × 67 × 337 × 421 × 463 × 631 × 3319 × 3499 × 4789 × 6073 × 6427 × 28513 × 33199 × 145069 × 10362529 × 81867661 × 227633407 × 6225803431<10> × 123679698913<12> × 13030208254603<14> × 17513875027111<14> × 22864311556633<14> × 87989435079877<14> × 16912366483493251<17> × 102176232786629233<18> × 9033642975850844737<19> × 15502260840362954719909<23> × 37681894326794146626121<23> × 312273321889143336074893<24> × 3955202198062795629622003<25> × 871028917576898982357020797<27> × 2665107906066773206783173754096081<34> × 39824892937303186001525100993399811<35> × 82721492925050166710438512180782661<35> × 8114043796984260128688250942595370463528745698590566713167179808898768806271729<79> × 387872296245044271444622972107043983188698744896773368865854233208580232800808725001502794933588031918479961<108> |