Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 537: | \[2^{537}-1\] | 7 × 359 × 1433 × 4297 × 16111 × 196543 × 1489459109360039866456940197095433721664951999121<49> × 6164459101748710901128556013786838840078806747851589150894064812504833580853956389332526997199<94> |