Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 192: | \[{20^{192}-1\over19}\] | 32 × 7 × 13 × 17 × 97 × 127 × 193 × 401 × 421 × 577 × 641 × 6529 × 10369 × 12277 × 31177 × 160001 × 821113 × 675796129 × 1505882353 × 969759919969<12> × 6756288659793814433<19> × 457543353681844436585642037889<30> × 6016843417749425380073724334377601<34> × 41421229588195582987688749156138489729<38> × 61750546109241021215734459867961040964362932229121<50> |