Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 629: | \[2^{629}-1\] | 223 × 131071 × 616318177 × 45470534643405479586527115047619453123209<41> × 205296815265168567756164047567360097447247109142889252157111<60> × 13247640898191993635882333868183025107726815859285731487950046819912806129<74> |