Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
282: | \[2^{282}-1\] | 32 × 7 × 283 × 2351 × 4513 × 1681003 × 13264529 × 4375578271<10> × 35273039401<11> × 111349165273<12> × 165768537521<12> × 646675035253258729<18> |