Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 414: | \[{20^{414}-1\over19}\] | 33 × 7 × 47 × 127 × 139 × 307 × 421 × 461 × 691 × 829 × 967 × 1381 × 42643 × 69481 × 509221 × 563041 × 32831443 × 64008001 × 197317369 × 1291121101 × 119553964489<12> × 113317059163579<15> × 3274400525856244223<19> × 3434459644792585729<19> × 4892995476168664219561<22> × 46266279097921483078651<23> × 887612944642122132741202450909<30> × 9679725346609474446515209660088368664307937627<46> × 1058025322978128659285808040769578184420673543468538418875771619733417758525235704721180650240714925447142552912204864058824399489<130> × 2184862032570422308074444966133284250690548357572266405681628366683042273433433463998738991787340358680001832686449969881551801182126914937648421<145> |