Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 569: | \[2^{569}-1\] | 15854617 × 55470673 × 182602768015690099110572536951<30> × 110582329556343704552404016904356632250881<42> × 108806602929626417274819133540757472113515266666479405303620102624927964940643869698641<87> |