Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 546: | \[{21^{546}-1\over20}\] | 2 × 11 × 43 × 79 × 337 × 421 × 463 × 547 × 631 × 1093 × 1171 × 3319 × 4789 × 6427 × 11701 × 20749 × 55147 × 189437 × 629773 × 1985257 × 81867661 × 227633407 × 516094151 × 22864311556633<14> × 97334207034611<14> × 424277387218231<15> × 7021471715414521<16> × 201251098294023961<18> × 7691526674487958994017<22> × 80459337199345300130638393<26> × 780822438421787911002783931<27> × 17179530906020598016893112344133<32> × 35381269315942497678572657090020747<35> × 1737708201406774525206464521323498021877<40> × 981183555175800288957395067736239079892543<42> × 64217370090877823505293705129529905363070886592641<50> × 4264091474110761334946377629947327910839217826620223120485043<61> × 498781338000312073562645370699142335995279921484122232195724922163118040842963447<81> × 6929029145185437686153954261336211074694773691304182946740640740841220351772061928351694259252263221264012121726006835280418162030942923952757<142> |