Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
147: | \[{5^{147}-1\over4}\] | 31 × 379 × 19531 × 519499 × 24556351 × 5071357999<10> × 2035895040229<13> × 203906616815994386234329833781<30> × 227376585863531112677002031251<30> |