Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 383: | \[2^{383}-1\] | 1440847 × 7435494593<10> × 503823044204581129045587727<27> × 15174923558680812616818436353130417<35> × 240522700235167893496900256599634325263<39> |