Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
601: | \[2^{601}-1\] | 3607 × 64863527 × 643390760896826272806925563059612685509039265031067456849993<60> × 55132269643416861808940702349402264919915041547757633769331818430511033108848146620408728664776308505356579463<110> |