Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 288: | \[{20^{288}-1\over19}\] | 33 × 7 × 13 × 17 × 37 × 73 × 97 × 127 × 307 × 401 × 421 × 1873 × 10369 × 12277 × 16993 × 24877 × 31177 × 69481 × 160001 × 821113 × 4468393 × 8900929 × 64008001 × 675796129 × 1505882353 × 4450002049<10> × 969759919969<12> × 6756288659793814433<19> × 48955653067235534958529<23> × 51433451961886233152209<23> × 41421229588195582987688749156138489729<38> × 16883663104304950695729693306191812859521383958922353<53> × 95237213018947306700334459365011735745317622163999241291457793575230731535732156307816027593009633<98> |