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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
21971711439434238 ~1988
219720293076084079 ~1990
21972479439449598 ~1988
21972689347168486310 ~1993
219727632197276319 ~1990
21972803439456078 ~1988
21972971439459438 ~1988
219732471757859779 ~1990
21973331439466638 ~1988
21973379439467598 ~1988
21973631439472638 ~1988
21973739439474798 ~1988
21973799439475998 ~1988
219738711757909699 ~1990
21973883439477678 ~1988
219740593955330639 ~1991
21974471439489438 ~1988
21974951439499038 ~1988
219756371318538239 ~1990
21975851439517038 ~1988
21975911439518238 ~1988
21976343439526878 ~1988
21976463439529278 ~1988
21976499439529998 ~1988
219764993955769839
Exponent Prime Factor Digits Year
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
21979943439598878 ~1988
219800515714813279 ~1991
21980363439607278 ~1988
219804011318824079 ~1990
21980411439608238 ~1988
21980771439615438 ~1988
21981143439622878 ~1988
21981611439632238 ~1988
21982151439643038 ~1988
219823513956823199 ~1991
21982451439649038 ~1988
Exponent Prime Factor Digits Year
219827211758617699 ~1990
21982931439658638 ~1988
21983999439679998 ~1988
219847632198476319 ~1990
21985031439700638 ~1988
219852411758819299 ~1990
21985283439705678 ~1988
219853611319121679 ~1990
21985499439709998 ~1988
219854991758839939
219857571758860579 ~1990
219859272198592719 ~1990
219868632198686319 ~1990
21986903439738078 ~1988
21987299439745998 ~1988
21988019439760398 ~1988
21988511439770238 ~1988
219889193958005439 ~1991
21989171439783438 ~1988
219896571319379439 ~1990
219897775277546499 ~1991
21989879439797598 ~1988
21990179439803598 ~1988
21990491439809838 ~1988
21990791439815838 ~1988
Exponent Prime Factor Digits Year
219907911759263299
219908531319451199 ~1990
21990959439819198 ~1988
21991583439831678 ~1988
21991631439832638 ~1988
21991883439837678 ~1988
21991919439838398 ~1988
21992231439844638 ~1988
21992303439846078 ~1988
21992303123156896910
21993239439864798 ~1988
219934811319608879 ~1990
21994139439882798 ~1988
219946032199460319 ~1990
21995063439901278 ~1988
219951773079324799 ~1990
21995243439904878 ~1988
21995423439908478 ~1988
21995903439918078 ~1988
219959211759673699 ~1990
21996179439923598 ~1988
21996983439939678 ~1988
219970211319821279 ~1990
21997091439941838 ~1988
21997103439942078 ~1988
1601
GIMPS The Prime Pages FactorDb.com
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26-07-05