Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
479: | \[2^{479}-1\] | 33385343 × 6293443049<10> × 683481445118041278287416124073722711169070307627777892361<57> × 10869186607773319558730501484452015470992764113369214593828236615596881<71> |