Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
457: | \[2^{457}-1\] | 150327409 × 2475539419689929784935319344449409898291165097323714578650943035813830300993611462717419801770460539016610145009605554380104535919<130> |