Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 282: | \[{20^{282}-1\over19}\] | 32 × 7 × 127 × 283 × 421 × 1129 × 4889 × 6863 × 64109 × 369703 × 587584507 × 790551835729<12> × 1930941642781<13> × 87910897915022054334374219609<29> × 31438451187269712801988294601466292978867<41> × 83956558156098889105419680100622902899696263817011<50> × 1523201995370741149853911341808474202883334149728543<52> × 268982315584351422249809659608589541850459210496902461251986841<63> × 5603803142534154347440575080572697963602222648003165314358382754858271<70> |