Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 306: | \[{20^{306}-1\over19}\] | 33 × 7 × 103 × 127 × 307 × 409 × 421 × 1429 × 3061 × 60589 × 69481 × 202879 × 983179 × 2567783 × 2640509 × 3698623 × 15757471 × 64008001 × 92054423 × 418593619 × 689852631578947368421<21> × 413824204679378563679356981<27> × 2025172630358438680596186769<28> × 2200293635138152581356053802893789<34> × 93432652605894895875162038827552650472442321569<47> × 644433049745505939538877970119459740656371232594481<51> × 191477601209469326017387038679687038834386862206656287175345344564886038155615529816696453081699421<99> |