Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 251: | \[{19^{251}-1\over18}\] | 6516463 × 7197240755459<13> × 265734216608927399<18> × 939473017559507297<18> × [4399178453929032381478489336460191379742596530554476160967278022315815240605261859009642241147277993244754751939719501717493055479237659784671189468073010580218262373560096540829288652438600607257871801420699716528935013949775826115144841903840519598218649981016951<265>] |