Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 687: | \[{5^{687}-1\over4}\] | 31 × 2749 × 53129 × 10166491699999<14> × 3680089414309493641<19> × 63785116081353654247759<23> × 25703365361608909110896940589<29> × 12101947939303673324813381857141044766729906970667251641650660796379874056373395515095101692007273411<101> × [115843270714163641802604775531965442739000171863205889393513985418476282321058841359314380199361399697313616827544808228942707620337109318763703708217429832303279348568367243189992997911088944381338983667916696295106020111302355658458035189838086916755440059752099364358357213078930577719<288>] |