Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 402: | \[{20^{402}-1\over19}\] | 32 × 7 × 127 × 269 × 421 × 1609 × 906779 × 326678467 × 411097261 × 607366391 × 834559639 × 11403523324087<14> × 155933666228489<15> × 270709998239641<15> × 1529359767707221<16> × 88136835669651007621314337921<29> × 900057529178404640631875427814741<33> × 156462958559288859033910810561734571<36> × 46718963450288956493633694872363837102423332961675747931169<59> × 1675321819620801402895922892830936675785863439805780007540110904579241<70> × 141027529625834791277325880782894530434550121999834925322075700531980089<72> × 59891857171161501501315138418750680677450229812760115826534668862079486815843797317174249429547839237253782294900301<116> |