Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 178: | \[{31^{178}-1\over30}\] | 25 × 179 × 1476511 × 6940416902143961<16> × 194382021317865834077<21> × 1895009826287880923167<22> × 1843793240833772195527188715497235054748361154878687143137366939289518721748165239<82> × 24246843769481130214472529718940013601484960141680850812950287239542364453897773091171556245837527066077330738364161<116> |