Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 345: | \[{20^{345}-1\over19}\] | 11 × 31 × 61 × 139 × 251 × 421 × 691 × 1381 × 3001 × 3221 × 261451 × 15899671 × 393682721 × 879708601 × 1187631911 × 4835458591<10> × 119553964489<12> × 2171940587581<13> × 18448719362911<14> × 113317059163579<15> × 41442373349295571<17> × 1964597484014792491<19> × 46266279097921483078651<23> × 7938685883284687902899551<25> × 887612944642122132741202450909<30> × 7121307273752901983750606756745314224670092894931<49> × 26443093051088090102949068310560313718386536424970956364143827938491691<71> × 59666150437618471768805259489765014322396025183725665677501355114448261144607003326639904471<92> |