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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
219614178784566819 ~1992
21961931439238638 ~1988
219619315710102079
21961991439239838 ~1988
21962411439248238 ~1988
219627011317762079 ~1989
219630771317784639 ~1989
219632093074849279 ~1990
219634512196345119 ~1990
21963671439273438 ~1988
21963863439277278 ~1988
21964031439280638 ~1988
219640811317844879 ~1989
219641571317849439 ~1989
219641571757132579
21964451439289038 ~1988
21965039439300798 ~1988
21965243439304878 ~1988
21965519439310398 ~1988
21966359439327198 ~1988
21966551439331038 ~1988
21966683439333678 ~1988
21967019439340398 ~1988
21967031439340638 ~1988
219670313954065599
Exponent Prime Factor Digits Year
21967091439341838 ~1988
21967331439346638 ~1988
21967763439355278 ~1988
219678673514858739 ~1991
21968099439361998 ~1988
21968279439365598 ~1988
21968483439369678 ~1988
21968543439370878 ~1988
219687171757497379 ~1990
21969191439383838 ~1988
21970499439409998 ~1988
21971399439427998 ~1988
21971459439429198 ~1988
21971639439432798 ~1988
21971711439434238 ~1988
219720293076084079 ~1990
21972479439449598 ~1988
21972803439456078 ~1988
21972971439459438 ~1988
219732471757859779 ~1990
21973331439466638 ~1988
21973379439467598 ~1988
21973631439472638 ~1988
21973739439474798 ~1988
21973799439475998 ~1988
Exponent Prime Factor Digits Year
219738711757909699 ~1990
21973883439477678 ~1988
219740593955330639 ~1991
21974471439489438 ~1988
21974951439499038 ~1988
21975851439517038 ~1988
21975911439518238 ~1988
21976343439526878 ~1988
21976463439529278 ~1988
21976499439529998 ~1988
219764993955769839
21976583439531678 ~1988
21976679439533598 ~1988
21976763439535278 ~1988
21977771439555438 ~1988
21977843439556878 ~1988
21978251439565038 ~1988
219782511758260099
21978899439577998 ~1988
21979043439580878 ~1988
219790911758327299 ~1990
21979151439583038 ~1988
21979343439586878 ~1988
21979439439588798 ~1988
21979571439591438 ~1988
Exponent Prime Factor Digits Year
21979943439598878 ~1988
219800515714813279 ~1991
21980363439607278 ~1988
219804011318824079 ~1989
21980411439608238 ~1988
21980771439615438 ~1988
21981143439622878 ~1988
21981611439632238 ~1988
21982151439643038 ~1988
219823513956823199 ~1991
21982451439649038 ~1988
21982931439658638 ~1988
21983999439679998 ~1988
219847632198476319 ~1990
21985031439700638 ~1988
219852411758819299 ~1990
21985283439705678 ~1988
219853611319121679 ~1989
21985499439709998 ~1988
219854991758839939
219859272198592719 ~1990
219868632198686319 ~1990
21986903439738078 ~1988
21987299439745998 ~1988
21988019439760398 ~1988
1495
GIMPS The Prime Pages FactorDb.com
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25-06-08