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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
20401571408031438 ~1988
20401739408034798 ~1988
20401919408038398 ~1988
204023211224139279 ~1989
20402831408056638 ~1988
20403011408060238 ~1988
20403023408060478 ~1988
20403419408068398 ~1988
20403899408077998 ~1988
20405303408106078 ~1988
20405459408109198 ~1988
20405663408113278 ~1988
20405783408115678 ~1988
204058931224353599 ~1989
20406143408122878 ~1988
20406539408130798 ~1988
204072973265167539 ~1990
20407511408150238 ~1988
20407631408152638 ~1988
204077592040775919 ~1990
204078672040786719 ~1990
20407883408157678 ~1988
20408243408164878 ~1988
20408411408168238 ~1988
20408543408170878 ~1988
Exponent Prime Factor Digits Year
204085611632684899 ~1990
20408639408172798 ~1988
20408711408174238 ~1988
20409131408182638 ~1988
204099192040991919 ~1990
204100736123021919 ~1991
20410139408202798 ~1988
20411371473543807310 ~1993
20411411408228238 ~1988
204117731224706399 ~1989
20412071408241438 ~1988
20412083408241678 ~1988
20412599408251998 ~1988
204126771633014179 ~1990
204129131224774799 ~1989
20413499408269998 ~1988
204138313266212979 ~1990
20414819408296398 ~1988
204151632041516319 ~1990
20415203408304078 ~1988
204153411224920479 ~1989
20415383408307678 ~1988
204154632041546319 ~1990
20415491408309838 ~1988
20415599408311998 ~1988
Exponent Prime Factor Digits Year
20415779408315598 ~1988
204158217758011999 ~1991
204159111633272899 ~1990
20415959408319198 ~1988
204165971224995839 ~1989
204169311633354499 ~1990
204177011225062079 ~1989
20417843408356878 ~1988
20418239408364798 ~1988
204182836942216239 ~1991
20418659408373198 ~1988
20418803408376078 ~1988
20419163408383278 ~1988
20419391408387838 ~1988
20419571408391438 ~1988
204195711633565699
20420243408404878 ~1988
20420759408415198 ~1988
20420891408417838 ~1988
20420951408419038 ~1988
20421419408428398 ~1988
204217671633741379 ~1990
204226571225359439 ~1989
204227331225363999 ~1989
20422751408455038 ~1988
Exponent Prime Factor Digits Year
204228374901480899 ~1991
20422859408457198 ~1988
204235673676242079 ~1990
204235919803323699 ~1991
204238316535625939 ~1991
20423939408478798 ~1988
204241011633928099 ~1990
20424143408482878 ~1988
204241971633935779 ~1990
20424263408485278 ~1988
20425021228760235310 ~1992
20425121159315943910 ~1992
20425271408505438 ~1988
20425319408506398 ~1988
20425571408511438 ~1988
20425799408515998 ~1988
20426291408525838 ~1988
204262931225577599 ~1989
20426603408532078 ~1988
204268211225609279 ~1989
20427119408542398 ~1988
204272418170896419 ~1991
20427359408547198 ~1988
20427971408559438 ~1988
204281411225688479 ~1989
1442
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25-06-08