Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 246: | \[{20^{246}-1\over19}\] | 32 × 7 × 83 × 127 × 421 × 739 × 1723 × 484129 × 7204849 × 824754607 × 35641617587<11> × 7925836394865601<16> × 175887076296565741<18> × 10401409500894667501<20> × 788985829969499330639<21> × 2490949949323610858879377601<28> × 19850094536448035972954342201<29> × 7921479827613016854472711513630655096419788523581541<52> × 36387204138988171741787766417526457378277729290679618568309563418264085964589245933819130501<92> |