Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 699: | \[2^{699}-1\] | 7 × 1399 × 135607 × 622577 × 1401190779823<13> × 1917765426328344646895407<25> × 23482447257772948338207752516264041<35> × 116868129879077600270344856324766260085066532853492178431<57> × 431363930838247166144681198345396801161915589485642909842198653394751<69> |