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Centralized information on Mersenne Primes

Mersenne Primes

Rank: 1

Prime: 22 - 1

Digits: 1

Discovered By: Ancient Greek mathematicians

Year: 500 BCE

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Rank: 2

Prime: 23 - 1

Digits: 1

Discovered By: Ancient Greek mathematicians

Year: 500 BCE

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Rank: 3

Prime: 25 - 1

Digits: 2

Discovered By: Ancient Greek mathematicians

Year: 275 BCE

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Rank: 4

Prime: 27 - 1

Digits: 3

Discovered By: Ancient Greek mathematicians

Year: 275 BCE

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Rank: 5

Prime: 213 - 1

Digits: 4

Discovered By: Anonymous

Year: 1456

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Rank: 6

Prime: 217 - 1

Digits: 6

Discovered By: Pietro Cataldi

Year: 1588

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Rank: 7

Prime: 219 - 1

Digits: 6

Discovered By: Pietro Cataldi

Year: 1588

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Rank: 8

Prime: 231 - 1

Digits: 10

Discovered By: Leonhard Euler

Year: 1772

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Rank: 9

Prime: 261 - 1

Digits: 19

Discovered By: Ivan Mikheevich Pervushin

Year: 1883

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Rank: 10

Prime: 289 - 1

Digits: 27

Discovered By: R. E. Powers

Year: 1911 Jun

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Rank: 11

Prime: 2107 - 1

Digits: 33

Discovered By: R. E. Powers

Year: 1914 Jun 11

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Rank: 12

Prime: 2127 - 1

Digits: 39

Discovered By: Édouard Lucas

Year: 1876 Jan 10

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Rank: 13

Prime: 2521 - 1

Digits: 157

Discovered By: Raphael M. Robinson

Year: 1952 Jan 30

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Rank: 14

Prime: 2607 - 1

Digits: 183

Discovered By: Raphael M. Robinson

Year: 1952 Jan 30

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Rank: 15

Prime: 21,279 - 1

Digits: 386

Discovered By: Raphael M. Robinson

Year: 1952 Jun 25

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Rank: 16

Prime: 22,203 - 1

Digits: 664

Discovered By: Raphael M. Robinson

Year: 1952 Oct 07

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Rank: 17

Prime: 22,281 - 1

Digits: 687

Discovered By: Raphael M. Robinson

Year: 1952 Oct 09

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Rank: 18

Prime: 23,217 - 1

Digits: 969

Discovered By: Hans Riesel

Year: 1957 Sep 08

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Rank: 19

Prime: 24,253 - 1

Digits: 1,281

Discovered By: Alexander Hurwitz

Year: 1961 Nov 03

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Rank: 20

Prime: 24,423 - 1

Digits: 1,332

Discovered By: Alexander Hurwitz

Year: 1961 Nov 03

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Rank: 21

Prime: 29,689 - 1

Digits: 2,917

Discovered By: Donald B. Gillies

Year: 1963 May 11

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Rank: 22

Prime: 29,941 - 1

Digits: 2,993

Discovered By: Donald B. Gillies

Year: 1963 May 16

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Rank: 23

Prime: 211,213 - 1

Digits: 3,376

Discovered By: Donald B. Gillies

Year: 1963 Jun 02

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Rank: 24

Prime: 219,937 - 1

Digits: 6,002

Discovered By: Bryant Tuckerman

Year: 1971 Mar 04

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Rank: 25

Prime: 221,701 - 1

Digits: 6,533

Discovered By: Landon Curt Noll & Laura Nickel

Year: 1978 Oct 30

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Rank: 26

Prime: 223,209 - 1

Digits: 6,987

Discovered By: Landon Curt Noll

Year: 1979 Feb 09

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Rank: 27

Prime: 244,497 - 1

Digits: 13,395

Discovered By: Harry Lewis Nelson & David Slowinski

Year: 1979 Apr 08

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Rank: 28

Prime: 286,243 - 1

Digits: 25,962

Discovered By: David Slowinski

Year: 1982 Sep 25

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Rank: 29

Prime: 2110,503 - 1

Digits: 33,265

Discovered By: Walter Colquitt & Luke Welsh

Year: 1988 Jan 28

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Rank: 30

Prime: 2132,049 - 1

Digits: 39,751

Discovered By: David Slowinski

Year: 1983 Sep 19

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Rank: 31

Prime: 2216,091 - 1

Digits: 65,050

Discovered By: David Slowinski

Year: 1985 Sep 01

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Rank: 32

Prime: 2756,839 - 1

Digits: 227,832

Discovered By: David Slowinski & Paul Gage

Year: 1992 Feb 19

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Rank: 33

Prime: 2859,433 - 1

Digits: 258,716

Discovered By: David Slowinski & Paul Gage

Year: 1994 Jan 04

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Rank: 34

Prime: 21,257,787 - 1

Digits: 378,632

Discovered By: David Slowinski & Paul Gage

Year: 1996 Sep 03

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Rank: 35

Prime: 21,398,269 - 1

Digits: 420,921

Discovered By: GIMPS / Joel Armengaud

Year: 1996 Nov 13

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Rank: 36

Prime: 22,976,221 - 1

Digits: 895,832

Discovered By: GIMPS / Gordon Spence

Year: 1997 Aug 24

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Rank: 37

Prime: 23,021,377 - 1

Digits: 909,526

Discovered By: GIMPS / Roland Clarkson

Year: 1998 Jan 27

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Rank: 38

Prime: 26,972,593 - 1

Digits: 2,098,960

Discovered By: GIMPS / Nayan Hajratwala

Year: 1999 Jun 01

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Rank: 39

Prime: 213,466,917 - 1

Digits: 4,053,946

Discovered By: GIMPS / Michael Cameron

Year: 2001 Nov 14

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Rank: 40

Prime: 220,996,011 - 1

Digits: 6,320,430

Discovered By: GIMPS / Michael Shafer

Year: 2003 Nov 17

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Rank: 41

Prime: 224,036,583 - 1

Digits: 7,235,733

Discovered By: GIMPS / Josh Findley

Year: 2004 May 15

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Rank: 42

Prime: 225,964,951 - 1

Digits: 7,816,230

Discovered By: GIMPS / Martin Nowak

Year: 2005 Feb 18

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Rank: 43

Prime: 230,402,457 - 1

Digits: 9,152,052

Discovered By: GIMPS / Curtis Cooper & Steven Boone

Year: 2005 Dec 15

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Rank: 44

Prime: 232,582,657 - 1

Digits: 9,808,358

Discovered By: GIMPS / Curtis Cooper & Steven Boone

Year: 2006 Sep 04

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Rank: 45

Prime: 237,156,667 - 1

Digits: 11,185,272

Discovered By: GIMPS / Hans-Michael Elvenich

Year: 2008 Sep 06

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Rank: 46

Prime: 242,643,801 - 1

Digits: 12,837,064

Discovered By: GIMPS / Odd M. Strindmo

Year: 2009 Jun 04

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Rank: 47

Prime: 243,112,609 - 1

Digits: 12,978,189

Discovered By: GIMPS / Edson Smith

Year: 2008 Aug 23

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Rank: 48

Prime: 257,885,161 - 1

Digits: 17,425,170

Discovered By: GIMPS / Curtis Cooper

Year: 2013 Jan 25

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Rank: 49*

Prime: 274,207,281 - 1

Digits: 22,338,618

Discovered By: GIMPS / Curtis Cooper

Year: 2016 Jan 07

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Rank: 50*

Prime: 277,232,917 - 1

Digits: 23,249,425

Discovered By: GIMPS / Jon Pace

Year: 2017 Dec 26

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Rank: 51*

Prime: 282,589,933 - 1

Digits: 24,862,048

Discovered By: GIMPS / Patrick Laroche

Year: 2018 Dec 07

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Rank: 52*

Prime: 2136,279,841 - 1

Digits: 41,024,320

Discovered By: GIMPS / Luke Durant

Year: 2024 Oct 12

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* May be changed due to new discoveries.