Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 747: | \[2^{747}-1\] | 7 × 73 × 167 × 1621324657 × 324965201690131831<18> × 57912614113275649087721<23> × 8241594690167137359552274418432855740327<40> × 34496745342453444817039264578731011283334300852411336570727768458411133501498552286451832685025097370302306935077006404386019354639<131> |