Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 36: | \[{20^{36}-1\over19}\] | 33 × 7 × 13 × 37 × 127 × 307 × 401 × 421 × 12277 × 24877 × 69481 × 64008001 × 4450002049<10> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 36: | \[{20^{36}-1\over19}\] | 33 × 7 × 13 × 37 × 127 × 307 × 401 × 421 × 12277 × 24877 × 69481 × 64008001 × 4450002049<10> |