Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 434: | \[{20^{434}-1\over19}\] | 3 × 72 × 29 × 71 × 311 × 827 × 8681 × 10529 × 11161 × 26041 × 32719 × 40487 × 70309 × 75269 × 1646101 × 340037881769<12> × 581740080393079<15> × 2086398873608791603<19> × 1927096019169236362594991761<28> × 335566676799518320433573040127<30> × 10745052699002910129003668482388390030218734404937467827141999461783912866121555666061234127793659610943368649030436190633227762371243769637775186473952158110711591702374739679837830619006220683480361369<203> × 3411644455729505290985074298410885439210931865533121276228501712002751643710331557065449369828376963651922989550420743385081397709843838226722464103007608744523112972471497994488182031201876904721162376382967<208> |