Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 340: | \[{20^{340}-1\over19}\] | 3 × 7 × 11 × 41 × 61 × 251 × 401 × 1361 × 2801 × 5101 × 152381 × 222361 × 2230061 × 2567783 × 2640509 × 92054423 × 455851601 × 18510970711<11> × 45251724385781<14> × 629433157137881<15> × 36372797968360681<17> × 126433576549825993751<21> × 689852631578947368421<21> × 2025046074983629951481<22> × 680653156857066936553996121<27> × 616538645269540162160455855390419188413152562932920852276721781<63> × 34113307283820749584538868774958148074560195294786511429553247410923682161082526984163957940278011106846488165477847022640090054001688576042047897599995893760000000401<167> |