Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 415: | \[{20^{415}-1\over19}\] | 11 × 61 × 251 × 116201 × 27817851030769<14> × 271781805106896281<18> × 2871487521092731391<19> × 414249085636225553185611071<27> × 43583485918084060233509354452846451<35> × 1538310379327087356765985018066468033557956350069<49> × [314603258616935598998062271844603271871055033984510746621723893947049568076940386425370091587994277028236030261683776072881532236826738531364740059711429845426921<162>] × [11996288304792412382444186020936217739311862086350683422187693744554098970548997760348844614035413301975297966100981058363578102068686650941734381805225697683946583089686717081818926968252028376084191748993031<209>] |