Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 547: | \[{4^{547}-1\over3}\] | 5471 × 1533926272849<13> × 172720604638150729<18> × 157552196128597543991<21> × 11514895455487400649824422273<29> × 3094370432032805355177230433270065636934209000089709476056046201975893944504526523646181882472019182454441940262575164313583<124> × 8694045087301330951920827992548062284112111129027602435936948477573651173572655999557979923042550606860504633923810675548859<124> |