Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 575: | \[{20^{575}-1\over19}\] | 11 × 61 × 151 × 251 × 691 × 1151 × 1381 × 1451 × 3221 × 1369801 × 7466201 × 15899671 × 46794901 × 393682721 × 1187631911 × 2171940587581<13> × 46266279097921483078651<23> × 7938685883284687902899551<25> × 7121307273752901983750606756745314224670092894931<49> × [14621124882590196644046746030333379211859126845439335531828309242536507120110984091949879017880076582818303624136724644958721693575335798086020013775717607163497277995991798349668101292935405057766551259700938341994031237507711392697351362832967542721582803009834926122739304535192351<284>] × [16871039656528735098215578588972082383896491351605987697185305598511097014091165984317101568601891026103498625689548884745207098336586666440082549896614641425028612857365976144227978044056873949095894047427607262069118192416418727093851391132954947275226160824319999967191019520006404001<287>] |