Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 208: | \[{19^{208}-1\over18}\] | 25 × 5 × 17 × 53 × 131 × 181 × 313 × 599 × 2393 × 3833 × 7177 × 15073 × 29251 × 146849 × 176021 × 291331 × 563377 × 133338869 × 186436849 × 69034016679735329<17> × 92174159182574048847888178637<29> × 20240476166390259493325765865267467809<38> × 11921717317891576212964238697496225698902188241<47> × 1764428742981693901330819085335852694072423372055694879180744801<64> |