Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 572: | \[{21^{572}-1\over20}\] | 22 × 112 × 132 × 17 × 23 × 53 × 79 × 89 × 661 × 859 × 2003 × 6073 × 32969 × 85229 × 101089 × 189437 × 207923 × 5023019 × 10362529 × 516094151 × 944156929 × 51473226377<11> × 165238453381<12> × 197647219771<12> × 17513875027111<14> × 7021471715414521<16> × 23509884574335185209<20> × 4718573764413203147069<22> × 281918624334829089082333<24> × 19725500031525136314134334713235761<35> × 713255542756934588000409316079479675200443737<45> × 87860558614985868619208135942899601679373945780409616385819485260873992836605828525341<86> × 3133215050775538159999253890862035621216929079706901880925831712192141277620814505531687549750066100763<103> × 174309824110699680808467057190226363197237784274809133450965065460762932200126016881412646074476693050851539944971127924272175500213143521555635971842903959078661303438514245198677765250462757130026937365345363588294571715144367791111488314552083244843753386283031483886598460609<279> |