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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
3988502879797700575910 ~2006
39885761695584006636711 ~2008
39888539935584395590311 ~2008
3988900871797780174310 ~2006
3989013683797802736710 ~2006
3989137931797827586310 ~2006
39891990412393519424711 ~2007
3989211599797842319910 ~2006
39893880413191510432911 ~2007
3989560103797912020710 ~2006
39900101335586014186311 ~2008
3990041351798008270310 ~2006
3990080603798016120710 ~2006
39902329732394139783911 ~2007
39902775132394166507911 ~2007
39904530372394271822311 ~2007
39906296532394377791911 ~2007
3990671651798134330310 ~2006
3990699623798139924710 ~2006
3990706679798141335910 ~2006
39908022612394481356711 ~2007
3990916019798183203910 ~2006
3991083683798216736710 ~2006
3991138559798227711910 ~2006
3991181063798236212710 ~2006
Exponent Prime Factor Digits Year
39913120972394787258311 ~2007
3991344083798268816710 ~2006
3991537631798307526310 ~2006
3991558559798311711910 ~2006
39915707639579769831311 ~2009
3991606259798321251910 ~2006
3991930583798386116710 ~2006
39919428117185497059911 ~2008
3991958783798391756710 ~2006
3992250491798450098310 ~2006
39925151393194012111311 ~2007
3992542283798508456710 ~2006
3992553959798510791910 ~2006
39926873812395612428711 ~2007
39927801532395668091911 ~2007
3992892803798578560710 ~2006
3992945903798589180710 ~2006
3993009539798601907910 ~2006
3993116591798623318310 ~2006
39933163913194653112911 ~2007
39934383532396063011911 ~2007
39934662293194772983311 ~2007
39935713193194857055311 ~2007
3994048631798809726310 ~2006
3994385159798877031910 ~2006
Exponent Prime Factor Digits Year
399454461154325806709712 ~2010
39945839532396750371911 ~2007
3994642703798928540710 ~2006
3994739219798947843910 ~2006
3994848191798969638310 ~2006
3994869383798973876710 ~2006
3994897271798979454310 ~2006
3995047151799009430310 ~2006
3995158463799031692710 ~2006
3995276231799055246310 ~2006
3995286923799057384710 ~2006
3995354003799070800710 ~2006
3995389571799077914310 ~2006
3995490923799098184710 ~2006
39955376572397322594311 ~2007
39955974793995597479111 ~2008
3995697383799139476710 ~2006
3995728631799145726310 ~2006
3995763539799152707910 ~2006
39958307473995830747111 ~2008
3995887751799177550310 ~2006
3996035063799207012710 ~2006
3996039119799207823910 ~2006
3996519743799303948710 ~2006
3996526763799305352710 ~2006
Exponent Prime Factor Digits Year
3996782351799356470310 ~2006
3996872063799374412710 ~2006
39968863932398131835911 ~2007
39969250073197540005711 ~2007
39969651012398179060711 ~2007
3997057523799411504710 ~2006
399735574911992067247112 ~2009
3997453979799490795910 ~2006
3998227151799645430310 ~2006
3998456543799691308710 ~2006
3998486039799697207910 ~2006
3998893319799778663910 ~2006
3998896283799779256710 ~2006
39989140132399348407911 ~2007
39989276572399356594311 ~2007
39989360573199148845711 ~2007
3999060119799812023910 ~2006
39990690132399441407911 ~2007
3999081539799816307910 ~2006
3999264359799852871910 ~2006
3999377351799875470310 ~2006
3999418151799883630310 ~2006
3999425879799885175910 ~2006
3999443771799888754310 ~2006
3999470543799894108710 ~2006
4447
GIMPS The Prime Pages FactorDb.com
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26-03-08