Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 102: | \[{20^{102}-1\over19}\] | 32 × 7 × 103 × 127 × 409 × 421 × 1429 × 3061 × 60589 × 2567783 × 2640509 × 3698623 × 92054423 × 689852631578947368421<21> × 2025172630358438680596186769<28> × 2200293635138152581356053802893789<34> |