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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
255039672550396719 ~1991
25504379510087598 ~1989
25504943510098878 ~1989
255050232550502319 ~1991
25505059224444519310 ~1993
255051011530306079 ~1990
25505279510105598 ~1989
25506203510124078 ~1989
25507271510145438 ~1989
25507571510151438 ~1989
25508291510165838 ~1989
25508471510169438 ~1989
25509119510182398 ~1989
255110212040881699 ~1990
255114293571600079 ~1991
255116212040929699 ~1990
25511639510232798 ~1989
25511723510234478 ~1989
25512671510253438 ~1989
25512719510254398 ~1989
25513283510265678 ~1989
25514039510280798 ~1989
255149872041198979 ~1990
25515779510315598 ~1989
25515923510318478 ~1989
Exponent Prime Factor Digits Year
25516103510322078 ~1989
255167211531003279 ~1990
255167872041342979 ~1990
25516871510337438 ~1989
25517291510345838 ~1989
25518803510376078 ~1989
255191411531148479 ~1990
25519283510385678 ~1989
25519519183740536910 ~1993
255199811531198879 ~1990
25520063510401278 ~1989
25521371510427438 ~1989
255214072041712579 ~1990
25521563510431278 ~1989
25522463510449278 ~1989
25522691510453838 ~1989
25522883510457678 ~1989
255232215615108639 ~1991
25523243510464878 ~1989
25523363510467278 ~1989
25523471510469438 ~1989
25523759510475198 ~1989
25523831510476638 ~1989
25524071510481438 ~1989
255241272552412719 ~1991
Exponent Prime Factor Digits Year
25524179510483598 ~1989
25525343510506878 ~1989
25525403510508078 ~1989
255256095615633999 ~1991
25525931510518638 ~1989
25526183107209968710 ~1992
25526279510525598 ~1989
255264611531587679 ~1990
255264831123165252111 ~1995
25526939510538798 ~1989
255277931531667599 ~1990
25527923510558478 ~1989
25528463510569278 ~1989
25529303510586078 ~1989
25529351510587038 ~1989
25530083510601678 ~1989
25530359510607198 ~1989
25530371510607438 ~1989
25530559102122236110 ~1992
25530671510613438 ~1989
25530899510617998 ~1989
25531139510622798 ~1989
25531283510625678 ~1989
25531619510632398 ~1989
25532161347237389710 ~1993
Exponent Prime Factor Digits Year
255323211531939279 ~1990
25532939510658798 ~1989
255329811531978879 ~1990
25533023510660478 ~1989
25533239510664798 ~1989
255334011532004079 ~1990
25533551510671038 ~1989
25533899510677998 ~1989
25534139510682798 ~1989
255344274596196879 ~1991
255347394596253039 ~1991
25535099510701998 ~1989
25535171510703438 ~1989
25535483510709678 ~1989
25535651510713038 ~1989
25536139183860200910 ~1993
255362573575075999 ~1991
255363412042907299 ~1990
255363472042907779 ~1990
25536383510727678 ~1989
25537103510742078 ~1989
25537163510743278 ~1989
25537331510746638 ~1989
25537763510755278 ~1989
25537931510758638 ~1989
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25-05-04