Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 313: | \[{15^{313}-1\over14}\] | 10338633204131<14> × 4509705968067017651<19> × 55975334836519016283437<23> × [3579546381414811040024900441807740264230873827660350702363819263441692710656431496050268724062923192487806514810319591135388881306780276022298226252655109886239287750704922427352941742291433203657523528796002885234182589359823918244437679842117871982070226203605891396849752596794108843811247687000698847774783053<313>] |