Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 253: | \[{31^{253}-1\over30}\] | 232 × 397 × 617 × 1509997 × 36364703 × 61562537 × 82982989 × 150332843 × 1975800971 × 7176374761323733117<19> × [88754841985769660750940553892365531913687686183235955289241494103364753037618664024229296957128957891931801742667061309096519827472462511579712818165928948937510679627049891060471155886610801058184395157766709904980717783624806441480454684909929343417583549915864952109563236026181272654592450724239991<302>] |