Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 855: | \[{4^{855}-1\over3}\] | 32 × 7 × 11 × 192 × 31 × 73 × 151 × 191 × 331 × 571 × 631 × 2281 × 6841 × 23311 × 32377 × 174763 × 524287 × 1101811 × 1212847 × 18837001 × 93507247 × 160465489 × 198098371 × 420778751 × 30327152671<11> × 3011347479614249131<19> × 709018264240844065111<21> × 1491477035689218775711<22> × 23241389572585939528171<23> × 25349242986637720573561<23> × 3042645634792541312037847<25> × 19177458387940268116349766612211<32> × 15653990705896313547269237220041169361<38> × 158362232618940822526398920291451047671<39> × 1175622349673189452424511749302390882321<40> × 266769296207361395498885374952177268846477734112491195761<57> × 112662327875512312448286206338953839918447853551167124756114011227377881<72> |