Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 252: | \[{20^{252}-1\over19}\] | 33 × 72 × 13 × 29 × 37 × 43 × 71 × 127 × 197 × 307 × 401 × 421 × 757 × 827 × 6679 × 10529 × 12277 × 14561 × 24877 × 32719 × 69481 × 460951 × 1464961 × 2750161 × 8651161 × 36363727 × 64008001 × 1424354653 × 4450002049<10> × 8442733531<10> × 1327100500372993081<19> × 56362086206010786883495213<26> × 10287600958458182504983419994609358363826919<44> × 68728066670457765494784262143995903488000008001<47> × 110681938091087194101630131136545430031409977601478545340275397361<66> |