Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 189: | \[{20^{189}-1\over19}\] | 29 × 71 × 379 × 421 × 6679 × 17389 × 32719 × 47251 × 460951 × 64008001 × 879338701 × 8442733531<10> × 298114935351301<15> × 554814907753599944037466111<27> × 10287600958458182504983419994609358363826919<44> × 1665961023516181647873325621851203600249127447271<49> × 1127461580188303176887898738308935621942051025338796941<55> |