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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
255595072044760579 ~1990
25559783511195678 ~1989
25559879511197598 ~1989
25560191511203838 ~1989
25560323511206478 ~1989
255603312556033119 ~1991
255607492044859939 ~1990
25560959511219198 ~1989
25561031511220638 ~1989
25561331511226638 ~1989
25561559511231198 ~1989
25562051511241038 ~1989
25562123511242478 ~1989
255632592556325919 ~1991
25563383511267678 ~1989
255635812045086499 ~1990
25563743511274878 ~1989
25563899511277998 ~1989
25564223511284478 ~1989
25564499511289998 ~1989
25564559511291198 ~1989
255647931533887599 ~1990
25565651511313038 ~1989
255659411533956479 ~1990
25566119511322398 ~1989
Exponent Prime Factor Digits Year
25566479511329598 ~1989
25566683511333678 ~1989
255669734090715699 ~1991
255672611534035679 ~1990
25568639511372798 ~1989
25568759511375198 ~1989
25568951511379038 ~1989
25569671511393438 ~1989
25570247122737185710 ~1992
25570463511409278 ~1989
255705773579880799 ~1991
25570631511412638 ~1989
255706731534240399 ~1990
25570739511414798 ~1989
255709436137026339 ~1991
25570991511419838 ~1989
25571879511437598 ~1989
255719112557191119 ~1991
255724672045797379 ~1990
25572611511452238 ~1989
25572671511453438 ~1989
25572719511454398 ~1989
25572731511454638 ~1989
25573043511460878 ~1989
25574903511498078 ~1989
Exponent Prime Factor Digits Year
255751131534506799 ~1990
25575611511512238 ~1989
25576283511525678 ~1989
25576703511534078 ~1989
25576871511537438 ~1989
25577003511540078 ~1989
25577099511541998 ~1989
25578071511561438 ~1989
25578083511561678 ~1989
25578263511565278 ~1989
25578431511568638 ~1989
25578517240438059910 ~1993
25578719511574398 ~1989
255788531534731199 ~1990
25579199511583998 ~1989
25579583511591678 ~1989
25579927353002992710 ~1993
25580063511601278 ~1989
255800771534804639 ~1990
25580111511602238 ~1989
25580603511612078 ~1989
255806931534841599 ~1990
25580939511618798 ~1989
25581299511625998 ~1989
25581443511628878 ~1989
Exponent Prime Factor Digits Year
25581971511639438 ~1989
25582019511640398 ~1989
25582079511641598 ~1989
25582163511643278 ~1989
255823011534938079 ~1990
25582751511655038 ~1989
25582919511658398 ~1989
25583219511664398 ~1989
25583951511679038 ~1989
25584263511685278 ~1989
255846792558467919 ~1991
25584731511694638 ~1989
25586339511726798 ~1989
255864892046919139 ~1990
25586579511731598 ~1989
25587203511744078 ~1989
25587563511751278 ~1989
25588379511767598 ~1989
255888615629549439 ~1991
25588883511777678 ~1989
25589951511799038 ~1989
25590503511810078 ~1989
25590863511817278 ~1989
25591091107482582310 ~1992
25591799511835998 ~1989
1608
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25-06-08