Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 516: | \[{20^{516}-1\over19}\] | 32 × 7 × 13 × 127 × 173 × 401 × 421 × 947 × 2237 × 4129 × 7741 × 12277 × 129001 × 815539 × 103498249 × 233096293 × 369122321 × 1887652357 × 6233315089<10> × 161475568369<12> × 2593691596542044913493<22> × 775312780916617188490043761<27> × 5678139079547159397912939375079489<34> × 740035581691937571153523632895280600341<39> × 12541974245083294274833711773684280721275134101<47> × 1045566869328945988335397790493839951221405348615477<52> × 4423036668279780761301352642429727962990898576959823<52> × 10183165864042489505744319341840444146171123988044014091683098589378219601<74> × 2911090650711805214708554533530447631300169619646278548725317185365144483897376875368857956362052619<100> × 172885544376438223968447003054005833561125199198012252285104017141152736981149764905260558430571798066873464485226729086298799661609<132> |