Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
695: | \[2^{695}-1\] | 31 × 3452778071 × 3578189431 × 5625767248687<13> × 123876132205208335762278423601<30> × 225797717267637708506527464987314161<36> × 901584692755427378722839770656354167189649601351<48> × 3025226007788738661409218532413354276443310201954701303389245001<64> |