Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 633: | \[2^{633}-1\] | 7 × 15193 × 2399291551 × 17689153588009<14> × 60272956433838849161<20> × 60560850681938908875991<23> × 9970146666059203361408046051199<31> × 3593875704495823757388199894268773153439<40> × 60377696324322249075824028749967823864613982859609<50> |