Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 354: | \[{20^{354}-1\over19}\] | 32 × 7 × 127 × 421 × 709 × 36109 × 882346771 × 4480274269<10> × 18822773659<11> × 32031477011<11> × 2505995335981<13> × 60435208609469<14> × 3287490641844751<16> × 50552666868943321<17> × 298657476606598274203<21> × 473111245352057786521<21> × 4443043113983919668779<22> × 594796417554507257525081<24> × 18125089740981918851143613362611829740110227944229<50> × 68202779608555688700931265288320576744876207244539338626143989342216644934362980665271<86> × 808771166879914195981963735256795575134168883605154033299399806313722821590711490739815563376642843831649464530485656979429323<126> |