Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 907: | \[2^{907}-1\] | 1170031 × 3256645177 × 131895016205024767<18> × 2152830659975686830992339732840546772221830147185299957584990626976623475264483978431907034205273681850774164540852300728233405057836985859987169137737353456784817046991632222733053023853584283587054957654936864544191287960435736268610880263<241> |