Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 286: | \[{20^{286}-1\over19}\] | 3 × 7 × 23 × 2081 × 2549 × 2861 × 3121 × 7723 × 142559 × 461891 × 9690539 × 735408649 × 424016563147<12> × 1037966360861<13> × 10778947368421<14> × 89069400431539529<17> × 821651084995160038985081<24> × 35990206967222156371667587832089524304326308981058127290969578110524231074711982724530429617137819<98> × 63166219640899545695888729905766590975930000542253353332271449782999160712225910280662427240150939120256760160969962244394675324510143081978055860507<149> |