Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
301: | \[{3^{301}-1\over2}\] | 431 × 1093 × 8127001 × 921928537909<12> × 380808546861411923<18> × 31575110690775101163983809<26> × 2954696283347370339434959009<28> × 1637488491377023232096661007236924821107539941341<49> |