Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 495: | \[{4^{495}-1\over3}\] | 32 × 7 × 112 × 19 × 23 × 31 × 67 × 73 × 89 × 151 × 199 × 331 × 631 × 683 × 881 × 991 × 2971 × 3191 × 5347 × 20857 × 23311 × 153649 × 201961 × 599479 × 18837001 × 48912491 × 415365721 × 33057806959<11> × 242099935645987<15> × 2252127523412251<16> × 2048568835297380486760231<25> × 334202934764737951438594746151<30> × 6084777159537635796550536863741698483921<40> × 1573646189656401207486767880720222624035301340663285632613380740307779641<73> |