Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 304: | \[{20^{304}-1\over19}\] | 3 × 7 × 17 × 19 × 401 × 457 × 112481 × 160001 × 362478049 × 1505882353 × 2622927733 × 75368484119<11> × 109850818001<12> × 192696104561<12> × 2272727294381<13> × 72098698642633148592794795053<29> × 10333341287228869948000461758601973726723288942244986242358961186470702720033601540537417593<92> × 198262330506125481479113308406512096525686061170433196131974686164315860611164186785780640558929330206772098596447701298501582388860133708456394614819362644208557747536520479014005921<183> |