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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
20339339406786798 ~1988
203393571220361439 ~1989
203395971627167779 ~1990
203396097729051439 ~1991
20340251406805038 ~1988
20340863406817278 ~1988
20341273288846076710 ~1993
203414811220488879 ~1989
20341991406839838 ~1988
20342243406844878 ~1988
20342303406846078 ~1988
20342351406847038 ~1988
20343371406867438 ~1988
203438331220629999 ~1989
20344211406884238 ~1988
203442731220656399 ~1989
20344319406886398 ~1988
203445174882684099 ~1991
20344619406892398 ~1988
20344823406896478 ~1988
20345483406909678 ~1988
20345519406910398 ~1988
20345603406912078 ~1988
20345771406915438 ~1988
20346071406921438 ~1988
Exponent Prime Factor Digits Year
20346251406925038 ~1988
203466171627729379 ~1990
20346899406937998 ~1988
20346923406938478 ~1988
20346983406939678 ~1988
203470272034702719 ~1990
20347511406950238 ~1988
20348171406963438 ~1988
20348963406979278 ~1988
203494793662906239 ~1990
203495571220973439 ~1989
20349683406993678 ~1988
20349743406994878 ~1988
203500793663014239 ~1990
20350559407011198 ~1988
20350931407018638 ~1988
20351339407026798 ~1988
20352191407043838 ~1988
20352203407044078 ~1988
203533791628270339 ~1990
20353559407071198 ~1988
20353583407071678 ~1988
20354303407086078 ~1988
203547792035477919 ~1990
20354891407097838 ~1988
Exponent Prime Factor Digits Year
20356139407122798 ~1988
20356211407124238 ~1988
203562291628498339 ~1990
20356439407128798 ~1988
20356631407132638 ~1988
20356751407135038 ~1988
203569011221414079 ~1989
203569331221415999 ~1989
20356991407139838 ~1988
20357171407143438 ~1988
20357399407147998 ~1988
20357411407148238 ~1988
20357663407153278 ~1988
20357819407156398 ~1988
20357951407159038 ~1988
20357999407159998 ~1988
20358083407161678 ~1988
203586177736274479 ~1991
20358683407173678 ~1988
20358983407179678 ~1988
203599931221599599 ~1989
20360603407212078 ~1988
20360699407213998 ~1988
20361443407228878 ~1988
20361479407229598 ~1988
Exponent Prime Factor Digits Year
20361791407235838 ~1988
20362571407251438 ~1988
20363099407261998 ~1988
20363279407265598 ~1988
20363351407267038 ~1988
20363663407273278 ~1988
20363963407279278 ~1988
20364251407285038 ~1988
20364479407289598 ~1988
20365139407302798 ~1988
203653131221918799 ~1989
203656011221936079 ~1989
203659571221957439 ~1989
203659791629278339 ~1990
203663511629308099 ~1990
203663931221983599 ~1989
20366543407330878 ~1988
20366579407331598 ~1988
20366639407332798 ~1988
20366939407338798 ~1988
203670011222020079 ~1989
20367359407347198 ~1988
203674371222046239 ~1989
20367491407349838 ~1988
20368079407361598 ~1988
1440
GIMPS The Prime Pages FactorDb.com
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25-06-08