Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 528: | \[{21^{528}-1\over20}\] | 24 × 112 × 13 × 17 × 23 × 61 × 67 × 73 × 89 × 193 × 353 × 421 × 433 × 463 × 661 × 673 × 3181 × 3433 × 3499 × 6073 × 28513 × 33199 × 62897 × 97241 × 300673 × 1001713 × 10362529 × 25392481 × 110922769 × 313433209 × 518118697 × 715521049 × 2660844721921<13> × 17513875027111<14> × 87989435079877<14> × 724051700079313<15> × 29831330140869137<17> × 32775913825604401<17> × 1860536006903334289<19> × 1105893073846539560737<22> × 4718573764413203147069<22> × 3955202198062795629622003<25> × 753175957312368961277402497<27> × 107148448424462133146016309681831670177<39> × 121328963242175651825534959690920155497<39> × 7731601158830082300840040072790267404673299009<46> × 101017263729134779403517994195749736643920057057<48> × 5417893210329015131948953725882474363297451134897776377577729527032001321285285179073<85> × 1598655458945338130875843813879704535746866594906963082082979749510441052845626572998557060630646073255267567695072081<118> |