Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 418: | \[{20^{418}-1\over19}\] | 3 × 7 × 19 × 23 × 419 × 100251449 × 70963674827<11> × 75368484119<11> × 109850818001<12> × 192696104561<12> × 424016563147<12> × 2272727294381<13> × 10778947368421<14> × 102780701154470997010739<24> × 8846844832394708765720725272334969<34> × 837986827024343250529784659141632003947<39> × [38116951293421063537215897874744530685348553950687212994399512352854599106027467481016532371047092049464524246320009916488822356338622020102135423055492921421153077861<167>] × [27059217266250636480431400064933434904939145643509621790944484228461190525076391148438684406813897427010911306234690757157387514756366954329368526495676802282043129414785166513961444509<185>] |