Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 364: | \[{21^{364}-1\over20}\] | 22 × 11 × 132 × 17 × 29 × 43 × 53 × 79 × 631 × 3319 × 3697 × 32969 × 101089 × 189437 × 81867661 × 516094151 × 68454248717<11> × 97334207034611<14> × 1761677187589229<16> × 7021471715414521<16> × 23509884574335185209<20> × 35381269315942497678572657090020747<35> × 1737708201406774525206464521323498021877<40> × 981183555175800288957395067736239079892543<42> × 1316867747688065165323997841399388788429258173677163309150813<61> × 4264091474110761334946377629947327910839217826620223120485043<61> × 10841606236180929066471411532869327215806022484216193004789698182175276315213117879060271037383259301651700923911433<116> |