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Small Mersenne Prime Factors
Prime numbers of the form Mp= 2p − 1 are called Mersenne primes. For Mp to be prime, p must also be prime.
Any factor q of a Mersenne number 2p − 1 must be of the form 2kp + 1, where integer k ≥ 0. Furthermore, q must be 1 or 7 mod 8.
Exponent Prime Factor Digits Year
1242621683248524336710 ~2002
12426357672236744380711 ~2004
1242647201745588320710 ~2003
1242668461745601076710 ~2003
1242743111994194488910 ~2003
1242765899248553179910 ~2002
1242772319248554463910 ~2002
1242800483248560096710 ~2002
1242852179248570435910 ~2002
1242912383248582476710 ~2002
1242929003248585800710 ~2002
1242929651248585930310 ~2002
1242932459248586491910 ~2002
1242938797745763278310 ~2003
1242940931248588186310 ~2002
1242941291248588258310 ~2002
1242949241994359392910 ~2003
1242954539248590907910 ~2002
1242961679248592335910 ~2002
1242994583248598916710 ~2002
1243072163248614432710 ~2002
1243087091248617418310 ~2002
1243091471248618294310 ~2002
1243092913745855747910 ~2003
12431066932983456063311 ~2005
Exponent Prime Factor Digits Year
12431184071988989451311 ~2004
12431270273232130270311 ~2005
1243158503248631700710 ~2002
1243207079248641415910 ~2002
1243242971994594376910 ~2003
1243244701745946820710 ~2003
1243286069994628855310 ~2004
1243287037745972222310 ~2003
1243309097745985458310 ~2003
1243324991248664998310 ~2002
124334558942771088261712 ~2008
1243348583248669716710 ~2002
1243353623248670724710 ~2002
1243396631248679326310 ~2002
12434208132984209951311 ~2005
1243431851248686370310 ~2002
1243473251248694650310 ~2002
12434897112238281479911 ~2004
1243515359248703071910 ~2002
1243523999248704799910 ~2002
1243531403248706280710 ~2002
1243588477746153086310 ~2003
1243613411248722682310 ~2002
1243700897994960717710 ~2004
1243722479248744495910 ~2002
Exponent Prime Factor Digits Year
1243800839248760167910 ~2002
1243805639248761127910 ~2002
1243808801746285280710 ~2003
1243847051248769410310 ~2002
1243864859248772971910 ~2002
1243886783248777356710 ~2002
1244139899248827979910 ~2002
12442092833234944135911 ~2005
1244275379248855075910 ~2002
1244282339248856467910 ~2002
1244285093746571055910 ~2003
1244304419248860883910 ~2002
1244320667995456533710 ~2004
1244325899248865179910 ~2002
1244365163248873032710 ~2002
1244374259248874851910 ~2002
1244381641746628984710 ~2003
1244442383248888476710 ~2002
1244571893746743135910 ~2003
12445950911244595091111 ~2004
12446106671244610667111 ~2004
1244687063248937412710 ~2002
1244734163248946832710 ~2002
1244761781995809424910 ~2004
1244762243248952448710 ~2002
Exponent Prime Factor Digits Year
1244803919248960783910 ~2002
1244855303248971060710 ~2002
1244871983248974396710 ~2002
1244885723248977144710 ~2002
1244906111248981222310 ~2002
1244909789995927831310 ~2004
1244912951248982590310 ~2002
1245005819249001163910 ~2002
1245044039249008807910 ~2002
1245054311249010862310 ~2002
1245063251249012650310 ~2002
12450967031245096703111 ~2004
1245123419249024683910 ~2002
1245168311249033662310 ~2002
1245168557996134845710 ~2004
1245195179249039035910 ~2002
12452244291743314200711 ~2004
1245308651249061730310 ~2002
1245332639249066527910 ~2002
1245340919249068183910 ~2002
1245375023249075004710 ~2002
1245379979249075995910 ~2002
1245395159249079031910 ~2002
12454619472241831504711 ~2004
1245523619249104723910 ~2002
3618
GIMPS The Prime Pages FactorDb.com
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25-06-08