Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
365: | \[2^{365}-1\] | 31 × 439 × 8761 × 2298041 × 9361973132609<13> × 13828603741081<14> × 82595052745831<14> × 25651395262318407934919734781737797067431285390452848441<56> |