Home e-mail
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
1991084471398216894310 ~2004
19911676132787634658311 ~2006
1991191703398238340710 ~2004
1991308391398261678310 ~2004
19913370673186139307311 ~2006
19914075411194844524711 ~2005
1991461211398292242310 ~2004
19914759711593180776911 ~2005
1991508131398301626310 ~2004
19916475731194988543911 ~2005
19916903473585042624711 ~2006
1991690951398338190310 ~2004
1991756411398351282310 ~2004
19917741895975322567111 ~2007
19917869331195072159911 ~2005
19917887873585219816711 ~2006
1991826803398365360710 ~2004
19918361038365711632711 ~2007
1991941403398388280710 ~2004
1991944583398388916710 ~2004
19919866271991986627111 ~2005
1992019163398403832710 ~2004
19921021311593681704911 ~2005
1992226979398445395910 ~2004
1992319319398463863910 ~2004
Exponent Prime Factor Digits Year
1992438551398487710310 ~2004
1992461759398492351910 ~2004
1992478223398495644710 ~2004
1992485219398497043910 ~2004
19925339874782081568911 ~2006
1992534179398506835910 ~2004
19925414771195524886311 ~2005
1992595799398519159910 ~2004
19926010571195560634311 ~2005
1992642083398528416710 ~2004
1992683879398536775910 ~2004
1992788771398557754310 ~2004
1992809303398561860710 ~2004
1992853451398570690310 ~2004
19930615571195836934311 ~2005
19931427771594514221711 ~2005
1993167119398633423910 ~2004
1993170659398634131910 ~2004
1993185251398637050310 ~2004
19932789971195967398311 ~2005
1993290023398658004710 ~2004
1993294139398658827910 ~2004
19933174371195990462311 ~2005
19934255571196055334311 ~2005
1993444751398688950310 ~2004
Exponent Prime Factor Digits Year
1993603511398720702310 ~2004
1993604891398720978310 ~2004
1993673399398734679910 ~2004
1993676579398735315910 ~2004
1993714319398742863910 ~2004
1993729379398745875910 ~2004
19937390931196243455911 ~2005
1993788743398757748710 ~2004
1993842839398768567910 ~2004
1993895399398779079910 ~2004
19939326731196359603911 ~2005
19939514393589112590311 ~2006
19939571591993957159111 ~2005
1994042783398808556710 ~2004
19940694591595255567311 ~2005
19940801571196448094311 ~2005
1994097359398819471910 ~2004
1994206211398841242310 ~2004
1994260343398852068710 ~2004
19942678611196560716711 ~2005
1994270699398854139910 ~2004
1994291363398858272710 ~2004
1994378819398875763910 ~2004
199438516768606849744912 ~2009
1994483831398896766310 ~2004
Exponent Prime Factor Digits Year
1994550359398910071910 ~2004
1994635943398927188710 ~2004
19947179695984153907111 ~2007
199490783310772502298312 ~2007
19949103172792874443911 ~2006
19949982891595998631311 ~2005
1995028991399005798310 ~2004
1995084023399016804710 ~2004
19951238035187321887911 ~2006
1995252851399050570310 ~2004
199532137912770056825712 ~2007
19953522531197211351911 ~2005
19954428371197265702311 ~2005
1995458579399091715910 ~2004
1995522719399104543910 ~2004
1995537359399107471910 ~2004
1995548759399109751910 ~2004
1995601931399120386310 ~2004
1995631031399126206310 ~2004
1995633779399126755910 ~2004
1995640799399128159910 ~2004
19956985671596558853711 ~2005
19958438511596675080911 ~2005
19958563191596685055311 ~2005
1995902879399180575910 ~2004
3839
GIMPS The Prime Pages FactorDb.com
Home
4.903.097 digits 		e-mail
25-07-08