Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 456: | \[{20^{456}-1\over19}\] | 32 × 7 × 13 × 19 × 127 × 229 × 401 × 421 × 457 × 6841 × 12277 × 31177 × 160001 × 821113 × 362478049 × 2622927733 × 45761565361<11> × 75368484119<11> × 109850818001<12> × 192696104561<12> × 222155207347<12> × 1374892397251<13> × 2272727294381<13> × 68465688966343<14> × 693371183978144761<18> × 811639212523583125993<21> × 72098698642633148592794795053<29> × 207373637974370334920244263016739<33> × 10333341287228869948000461758601973726723288942244986242358961186470702720033601540537417593<92> × 4734172325105376746958728328769869862970783391081337286165535303663510880257642495974336000401<94> × 600424212607128913655538308505024329711247084986502350238791523750748691642623307420073815983626044010198104421196784433961862772936007577944103156167690537<156> |