Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 296: | \[{20^{296}-1\over19}\] | 3 × 7 × 149 × 401 × 65269 × 160001 × 368447 × 919969 × 2889957151 × 7369911593489<13> × 13093669851817<14> × 9609038940231949<16> × 49714830758882209<17> × 124065005275823894023123<24> × 383493384240205993228059557962159<33> × 61244289678958373462403771583536382996866287437<47> × 76914762707557891318119857502785990100399509173<47> × 5052820125793048086827052506426541706021225901534931694362416998463217260222968025863550265266689072646040942430002258021964074797951515337<139> |