Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 558: | \[{20^{558}-1\over19}\] | 33 × 7 × 127 × 307 × 311 × 421 × 1489 × 8929 × 11161 × 20089 × 40487 × 69481 × 75269 × 406969 × 1013329 × 1646101 × 22990159 × 48886381 × 64008001 × 340037881769<12> × 581740080393079<15> × 4677213964284283<16> × 335566676799518320433573040127<30> × 1531645577360636880964320512281<31> × 635896140113507011824097778781382199751604398154509736423<57> × 735669815930822532937503688968508571966425959548932871142136554846387363229<75> × [112070781074323383132738356013912008438365674451388837754694608189110718640153862358026915560581461753751486800760319220441793388953198851581568865509514254030910369466635626157505832354776905233357449<201>] × [66974005863585334889057751452469848418777911521793484176271218181283295571526875345636844611102709978070286602052851001477933167559128517210041233105106434749878963827292034421908171740206483936372745495597299<209>] |