Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 379: | \[2^{379}-1\] | 180818808679<12> × 6809649408891001685768937590233308625949604176033855796938978177320539702698633946720428389517879894953<103> |