Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
169: | \[{20^{169}-1\over19}\] | 2029 × 3121 × 6761 × 10141 × 142559 × 9690539 × 468434955431<12> × 850012976074535982428711068634520331706078425231<48> × 1649038164632685578542992427628917483575645002582219763008899743201265215941328535950330500869484897694126830841465082771352855179129<133> |