Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 258: | \[{20^{258}-1\over19}\] | 32 × 7 × 127 × 421 × 947 × 7741 × 815539 × 369122321 × 6233315089<10> × 775312780916617188490043761<27> × 5678139079547159397912939375079489<34> × 740035581691937571153523632895280600341<39> × 12541974245083294274833711773684280721275134101<47> × 4423036668279780761301352642429727962990898576959823<52> × 2911090650711805214708554533530447631300169619646278548725317185365144483897376875368857956362052619<100> |