Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
309: | \[{5^{309}-1\over4}\] | 31 × 619 × 3709 × 28429 × 8934148519<10> × 59117897713198738371603984809<29> × 39546955636451768643571562540114219<35> × 42173111702521341940416989340041084225191<41> × 134486823638064912562947358614376605014890240423391805433867220946046780045282460232517771<90> |