Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
271: | \[{5^{271}-1\over4}\] | 64993931 × 12987902099<11> × 780547563512701854453476336778024687169735220009813052557506230968719410571683000460160742288210762748139728300673734883074024956108922257384617810962056157368843622445299<171> |