Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 637: | \[{8^{637}-1\over7}\] | 72 × 79 × 127 × 337 × 911 × 3823 × 8191 × 15289 × 121369 × 108749551 × 112901153 × 23140471537<11> × 31945881241<11> × 4432676798593<13> × 153925026222241<15> × 4093204977277417<16> × 8573192048327176271<19> × 86977595801949844993<20> × 473454648121049723857<21> × 2741672362528725535068727<25> × 6044274266901603399200353<25> × 153472677405951306470238401460959<33> × 22734546382983841003979491437223900758487279<44> × [5839333589251378334353175190320774914627751786166774021426016538784978270153319203762506563233156134256604527891940818536341667149751224624311393869538745000951580825860812022944796268316412748079511013304442821920007448453154503139568772259692360902118398409436277672036813192453553<283>] |