Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

List of Known Mersenne Prime Numbers

#2p-1DigitsDate DiscoveredDiscovered ByMethod / HardwarePerfect Number
122-11c. 500 BCEAncient Greek mathematicians21 ·
(22-1)
223-11c. 500 BCEAncient Greek mathematicians22 ·
(23-1)
325-12c. 275 BCEAncient Greek mathematicians24 ·
(25-1)
427-13c. 275 BCEAncient Greek mathematicians26 ·
(27-1)
5213-141456Anonymoustrial division212 ·
(213-1)
6217-161588Pietro Catalditrial division216 ·
(217-1)
7219-161588Pietro Catalditrial division218 ·
(219-1)
8231-1101772Leonhard EulerEnhanced trial division230 ·
(231-1)
9261-1191883Ivan Mikheevich PervushinLucas sequences260 ·
(261-1)
10289-1271911 JunR. E. PowersLucas sequences288 ·
(289-1)
112107-1331914 Jun 11R. E. PowersLucas sequences2106 ·
(2107-1)
122127-1391876 Jan 10Édouard LucasLucas sequences2126 ·
(2127-1)
132521-11571952 Jan 30Raphael M. RobinsonL-L / SWAC2520 ·
(2521-1)
142607-11831952 Jan 30Raphael M. RobinsonL-L / SWAC2606 ·
(2607-1)
1521279-13861952 Jun 25Raphael M. RobinsonL-L / SWAC21278 ·
(21279-1)
1622203-16641952 Oct 07Raphael M. RobinsonL-L / SWAC22202 ·
(22203-1)
1722281-16871952 Oct 09Raphael M. RobinsonL-L / SWAC22280 ·
(22281-1)
1823217-19691957 Sep 08Hans RieselL-L / BESK23216 ·
(23217-1)
1924253-112811961 Nov 03Alexander HurwitzL-L / IBM 709024252 ·
(24253-1)
2024423-113321961 Nov 03Alexander HurwitzL-L / IBM 709024422 ·
(24423-1)
2129689-129171963 May 11Donald B. GilliesL-L / ILLIAC II29688 ·
(29689-1)
2229941-129931963 May 16Donald B. GilliesL-L / ILLIAC II29940 ·
(29941-1)
23211213-133761963 Jun 02Donald B. GilliesL-L / ILLIAC II211212 ·
(211213-1)
24219937-160021971 Mar 04Bryant TuckermanL-L / IBM 360/91219936 ·
(219937-1)
25221701-165331978 Oct 30Landon Curt Noll & Laura NickelL-L / CDC Cyber 174221700 ·
(221701-1)
26223209-169871979 Feb 09Landon Curt NollL-L / CDC Cyber 174223208 ·
(223209-1)
27244497-1133951979 Apr 08Harry Lewis Nelson & David SlowinskiL-L / Cray 1244496 ·
(244497-1)
28286243-1259621982 Sep 25David SlowinskiL-L / Cray 1286242 ·
(286243-1)
292110503-1332651988 Jan 28Walter Colquitt & Luke WelshL-L / NEC SX-22110502 ·
(2110503-1)
302132049-1397511983 Sep 19David SlowinskiL-L / Cray X-MP2132048 ·
(2132049-1)
312216091-1650501985 Sep 01David SlowinskiL-L / Cray X-MP/242216090 ·
(2216091-1)
322756839-12278321992 Feb 19David Slowinski & Paul GageL-L / Maple on Harwell Lab Cray-22756838 ·
(2756839-1)
332859433-12587161994 Jan 04David Slowinski & Paul GageL-L / Cray C902859432 ·
(2859433-1)
3421257787-13786321996 Sep 03David Slowinski & Paul GageL-L / Cray T9421257786 ·
(21257787-1)
3521398269-14209211996 Nov 13GIMPS / Joel ArmengaudL-L / Prime95 on 90 MHz Pentium PC21398268 ·
(21398269-1)
3622976221-18959321997 Aug 24GIMPS / Gordon SpenceL-L / Prime95 on 100 MHz Pentium PC22976220 ·
(22976221-1)
3723021377-19095261998 Jan 27GIMPS / Roland ClarksonL-L / Prime95 on 200 MHz Pentium PC23021376 ·
(23021377-1)
3826972593-120989601999 Jun 01GIMPS / Nayan HajratwalaL-L / Prime95 on 350 MHz Pentium II IBM Aptiva26972592 ·
(26972593-1)
39213466917-140539462001 Nov 14GIMPS / Michael CameronL-L / Prime95 on 800 MHz Athlon Thunderbird213466916 ·
(213466917-1)
40220996011-163204302003 Nov 17GIMPS / Michael ShaferL-L / Prime95 on 2 GHz Dell Dimension220996010 ·
(220996011-1)
41224036583-172357332004 May 15GIMPS / Josh FindleyL-L / Prime95 on 2.4 GHz Pentium 4 PC224036582 ·
(224036583-1)
42225964951-178162302005 Feb 18GIMPS / Martin NowakL-L / Prime95 on 2.4 GHz Pentium 4 PC225964950 ·
(225964951-1)
43230402457-191520522005 Dec 15GIMPS / Curtis Cooper & Steven BooneL-L / Prime95 on 2 GHz Pentium 4 PC230402456 ·
(230402457-1)
44232582657-198083582006 Sep 04GIMPS / Curtis Cooper & Steven BooneL-L / Prime95 on 3 GHz Pentium 4 PC232582656 ·
(232582657-1)
45237156667-1111852722008 Sep 06GIMPS / Hans-Michael ElvenichL-L / Prime95 on 2.83 GHz Core 2 Duo PC237156666 ·
(237156667-1)
46242643801-1128370642009 Jun 04GIMPS / Odd M. StrindmoL-L / Prime95 on 3 GHz Core 2 PC242643800 ·
(242643801-1)
47243112609-1129781892008 Aug 23GIMPS / Edson SmithL-L / Prime95 on Dell Optiplex 745243112608 ·
(243112609-1)
48257885161-1174251702013 Jan 25GIMPS / Curtis CooperL-L / Prime95 on Intel Core2 Duo E8400 @ 3.00GHz257885160 ·
(257885161-1)
49*274207281-1223386182016 Jan 07GIMPS / Curtis CooperL-L / Prime95 on Intel i7-4790 @ 3.60GHz274207280 ·
(274207281-1)
50*277232917-1232494252017 Dec 26GIMPS / Jon PaceL-L / Prime95 on Intel i5-6600 @ 3.30GHz277232916 ·
(277232917-1)
51*282589933-1248620482018 Dec 07GIMPS / Patrick LarocheL-L / Prime95 on Intel i5-4590T @ 2.0GHz282589932 ·
(282589933-1)
* Provisional ranking, not all candidates between M57885161 and M82589933 have been eliminated

Distribution graph of Mersenne Primes found by GIMPS

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