Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 391: | \[{22^{391}-1\over21}\] | 239 × 4463 × 344863 × 74729519 × 176634767651<12> × 1323064018651<13> × 60575166785239<14> × 813015780403397<15> × 42314508435530436257<20> × 1227954589914012016369<22> × [2234411096142113405125311218977066720425262288597777133558191246372457998412748999334748909875597493165625767312698768988291805407201809468263331055352649897385180703583096616524741184453999543533685480020910388341741470903169462922366437196193104890179001719252355702024491250473067969007178286069019647176858050222650345172925142665059145060475711434351096699934955503377762035771738069662576885170192674761377<412>] |