Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 608: | \[{20^{608}-1\over19}\] | 3 × 7 × 17 × 19 × 97 × 401 × 457 × 112481 × 160001 × 362478049 × 1505882353 × 2622927733 × 75368484119<11> × 109850818001<12> × 192696104561<12> × 2272727294381<13> × 6756288659793814433<19> × 29906192423794859755969<23> × 72098698642633148592794795053<29> × 10333341287228869948000461758601973726723288942244986242358961186470702720033601540537417593<92> × 198262330506125481479113308406512096525686061170433196131974686164315860611164186785780640558929330206772098596447701298501582388860133708456394614819362644208557747536520479014005921<183> × [16629440129399135627017767095027973047485135591148550586063879656907502463855316864324369810376399292142121400192968668615617445174162308538800848007895304532288145423752698154224468116063484223816052229590896158548617309251116643959943887695827324423466156787742201126008852030870122644844801115363514881009029253763257852499378158264230265900400920129<353>] |