Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 377: | \[{20^{377}-1\over19}\] | 59 × 929 × 3121 × 10789 × 142559 × 143609 × 9690539 × 466307299 × 584229661601<12> × 17284829344901<14> × 71353204641689<14> × 81900139826909<14> × [160793617720582569587757395878465095107327606337358182038393162365877330060958069481455956099224678070943193176971186537026821018145428535096092082393003559428010298283722189205166615670524301538823930769388785835285195366343959435528070694523568861303687909101260519290124250420661814686316661040175838027910143020674492949277986749761420810500594639094776472417754681580141808006077968185142395709<399>] |