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Prime: 2² - 1

Digits: s 1

Discovered By: Ancient Greek mathematicians

Date: 500 BCE

Prime: 2³ - 1

Digits: s 1

Discovered By: Ancient Greek mathematicians

Date: 500 BCE

Prime: 2⁵ - 1

Digits: s 2

Discovered By: Ancient Greek mathematicians

Date: 275 BCE

Prime: 2⁷ - 1

Digits: s 3

Discovered By: Ancient Greek mathematicians

Date: 275 BCE

Prime: 2¹³ - 1

Digits: s 4

Discovered By: Anonymous

Date: 1456

Prime: 2¹⁷ - 1

Digits: s 6

Discovered By: Pietro Cataldi

Date: 1588

Prime: 2¹⁹ - 1

Digits: s 6

Discovered By: Pietro Cataldi

Date: 1588

Prime: 2³¹ - 1

Digits: s 10

Discovered By: Leonhard Euler

Date: 1772

Prime: 2⁶¹ - 1

Digits: s 19

Discovered By: Ivan Mikheevich Pervushin

Date: 1883

Prime: 2⁸⁹ - 1

Digits: s 27

Discovered By: R. E. Powers

Date: 1911 Jun

Prime: 2¹⁰⁷ - 1

Digits: s 33

Discovered By: R. E. Powers

Date: 1914 Jun 11

Prime: 2¹²⁷ - 1

Digits: s 39

Discovered By: Édouard Lucas

Date: 1876 Jan 10

Prime: 2⁵²¹ - 1

Digits: s 157

Discovered By: Raphael M. Robinson

Date: 1952 Jan 30

Prime: 2⁶⁰⁷ - 1

Digits: s 183

Discovered By: Raphael M. Robinson

Date: 1952 Jan 30

Prime: 2^1,279 - 1

Digits: s 386

Discovered By: Raphael M. Robinson

Date: 1952 Jun 25

Prime: 2^2,203 - 1

Digits: s 664

Discovered By: Raphael M. Robinson

Date: 1952 Oct 07

Prime: 2^2,281 - 1

Digits: s 687

Discovered By: Raphael M. Robinson

Date: 1952 Oct 09

Prime: 2^3,217 - 1

Digits: s 969

Discovered By: Hans Riesel

Date: 1957 Sep 08

Prime: 2^4,253 - 1

Digits: s 1,281

Discovered By: Alexander Hurwitz

Date: 1961 Nov 03

Prime: 2^4,423 - 1

Digits: s 1,332

Discovered By: Alexander Hurwitz

Date: 1961 Nov 03

Prime: 2^9,689 - 1

Digits: s 2,917

Discovered By: Donald B. Gillies

Date: 1963 May 11

Prime: 2^9,941 - 1

Digits: s 2,993

Discovered By: Donald B. Gillies

Date: 1963 May 16

Prime: 2^11,213 - 1

Digits: s 3,376

Discovered By: Donald B. Gillies

Date: 1963 Jun 02

Prime: 2^19,937 - 1

Digits: s 6,002

Discovered By: Bryant Tuckerman

Date: 1971 Mar 04

Prime: 2^21,701 - 1

Digits: s 6,533

Discovered By: Landon Curt Noll & Laura Nickel

Date: 1978 Oct 30

Prime: 2^23,209 - 1

Digits: s 6,987

Discovered By: Landon Curt Noll

Date: 1979 Feb 09

Prime: 2^44,497 - 1

Digits: s 13,395

Discovered By: Harry Lewis Nelson & David Slowinski

Date: 1979 Apr 08

Prime: 2^86,243 - 1

Digits: s 25,962

Discovered By: David Slowinski

Date: 1982 Sep 25

Prime: 2^110,503 - 1

Digits: s 33,265

Discovered By: Walter Colquitt & Luke Welsh

Date: 1988 Jan 28

Prime: 2^132,049 - 1

Digits: s 39,751

Discovered By: David Slowinski

Date: 1983 Sep 19

Prime: 2^216,091 - 1

Digits: s 65,050

Discovered By: David Slowinski

Date: 1985 Sep 01

Prime: 2^756,839 - 1

Digits: s 227,832

Discovered By: David Slowinski & Paul Gage

Date: 1992 Feb 19

Prime: 2^859,433 - 1

Digits: s 258,716

Discovered By: David Slowinski & Paul Gage

Date: 1994 Jan 04

Prime: 2^1,257,787 - 1

Digits: s 378,632

Discovered By: David Slowinski & Paul Gage

Date: 1996 Sep 03

Prime: 2^1,398,269 - 1

Digits: s 420,921

Discovered By: GIMPS / Joel Armengaud

Date: 1996 Nov 13

Prime: 2^2,976,221 - 1

Digits: s 895,832

Discovered By: GIMPS / Gordon Spence

Date: 1997 Aug 24

Prime: 2^3,021,377 - 1

Digits: s 909,526

Discovered By: GIMPS / Roland Clarkson

Date: 1998 Jan 27

Prime: 2^6,972,593 - 1

Digits: s 2,098,960

Discovered By: GIMPS / Nayan Hajratwala

Date: 1999 Jun 01

Prime: 2^13,466,917 - 1

Digits: s 4,053,946

Discovered By: GIMPS / Michael Cameron

Date: 2001 Nov 14

Prime: 2^20,996,011 - 1

Digits: s 6,320,430

Discovered By: GIMPS / Michael Shafer

Date: 2003 Nov 17

Prime: 2^24,036,583 - 1

Digits: s 7,235,733

Discovered By: GIMPS / Josh Findley

Date: 2004 May 15

Prime: 2^25,964,951 - 1

Digits: s 7,816,230

Discovered By: GIMPS / Martin Nowak

Date: 2005 Feb 18

Prime: 2^30,402,457 - 1

Digits: s 9,152,052

Discovered By: GIMPS / Curtis Cooper & Steven Boone

Date: 2005 Dec 15

Prime: 2^32,582,657 - 1

Digits: s 9,808,358

Discovered By: GIMPS / Curtis Cooper & Steven Boone

Date: 2006 Sep 04

Prime: 2^37,156,667 - 1

Digits: s 11,185,272

Discovered By: GIMPS / Hans-Michael Elvenich

Date: 2008 Sep 06

Prime: 2^42,643,801 - 1

Digits: s 12,837,064

Discovered By: GIMPS / Odd M. Strindmo

Date: 2009 Jun 04

Prime: 2^43,112,609 - 1

Digits: s 12,978,189

Discovered By: GIMPS / Edson Smith

Date: 2008 Aug 23

Prime: 2^57,885,161 - 1

Digits: s 17,425,170

Discovered By: GIMPS / Curtis Cooper

Date: 2013 Jan 25

Prime: 2^74,207,281 - 1

Digits: s 22,338,618

Discovered By: GIMPS / Curtis Cooper

Date: 2016 Jan 07

Prime: 2^77,232,917 - 1

Digits: s 23,249,425

Discovered By: GIMPS / Jon Pace

Date: 2017 Dec 26

Prime: 2^82,589,933 - 1

Digits: s 24,862,048

Discovered By: GIMPS / Patrick Laroche

Date: 2018 Dec 07

Prime: 2^136,279,841 - 1

Digits: s 41,024,320

Discovered By: GIMPS / Luke Durant

Date: 2024 Oct 12