Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 216: | \[{20^{216}-1\over19}\] | 34 × 7 × 13 × 37 × 73 × 109 × 127 × 307 × 401 × 421 × 4483 × 7237 × 12277 × 24877 × 31177 × 69481 × 160001 × 821113 × 4468393 × 64008001 × 99672121 × 879338701 × 1794112741 × 4450002049<10> × 160408194049<12> × 298114935351301<15> × 51433451961886233152209<23> × 6035615984109698790059593<25> × 52814134683963054037760473<26> × 92355203546948460989600533412641<32> × 9495575063700428354290415621942793975404173<43> |