Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 335: | \[2^{335}-1\] | 31 × 464311 × 193707721 × 1532217641 × 761838257287<12> × 21505409328405921060057783156144213618485460844911284448661782641<65> |