Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 488: | \[{31^{488}-1\over30}\] | 27 × 13 × 37 × 409 × 977 × 1129 × 14519 × 50848444051<11> × 9129867406769<13> × 3138190980318677<16> × 12712081567468100953<20> × 60290903116166148697<20> × 13578586277937589671409<23> × 20601945976800054632554493<26> × 2458422198511222771859601111973397<34> × 80522563310759344709159766209323530487860741257208170281<56> × 4986168979530543442200031132013850702682116109677075729786350050229<67> × 1931887800696665671657743114385100368081001543663365709602704914862569<70> × [8449014393544961979306707980299922622428631760592087712005827041698078909067714001814911817213146621552209335358383636933227312806986859172129829452198871084264082650532453988113347899694992266580994273881432800165840919976634847485471610371248700334055638421106948447709416472401860334286158720089480934514518054882630613672029700644366494199147522362425601<358>] |