Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 455: | \[2^{455}-1\] | 31 × 71 × 127 × 911 × 8191 × 122921 × 200201 × 112901153 × 23140471537<11> × 145295143558111<15> × 4774797453608343803270988984332214098351782527747577456028391624903856636676854631<82> |