Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 338: | \[{20^{338}-1\over19}\] | 3 × 7 × 2029 × 2081 × 2549 × 3121 × 6761 × 10141 × 142559 × 9690539 × 70875221 × 735408649 × 468434955431<12> × 23012751749796166936568970383<29> × 850012976074535982428711068634520331706078425231<48> × 31935981155652533221951364653816866565967655797243704913887053398785947120441043927<83> × 1753622388987313321815699242990306593636053665316735863811099125801231899350678129541<85> × 1649038164632685578542992427628917483575645002582219763008899743201265215941328535950330500869484897694126830841465082771352855179129<133> |