Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 204: | \[{20^{204}-1\over19}\] | 32 × 7 × 13 × 103 × 127 × 401 × 409 × 421 × 1429 × 3061 × 6121 × 12277 × 60589 × 2567783 × 2640509 × 3698623 × 92054423 × 629433157137881<15> × 958831060666818517<18> × 689852631578947368421<21> × 680653156857066936553996121<27> × 2025172630358438680596186769<28> × 2200293635138152581356053802893789<34> × 31509362983401039023445754266760205245987628950220248991021893<62> |