Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 459: | \[2^{459}-1\] | 7 × 73 × 103 × 919 × 2143 × 11119 × 131071 × 262657 × 407770693450231393<18> × 24418671951944649151<20> × 75582488424179347083438319<26> × 49848448234572624009465371493197779785120970152607<50> |