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Status of MMp where Mp is a Mersenne prime

(from Will Edgington's Double Mersenne Primes' page)

For the second factor of M(M(17)) and the first factor of M(M(31)) see also page 45 of Guy Haworth's 1987 report on Mersenne Numbers.

M( M( 2 ) )P
M( M( 3 ) )P
M( M( 5 ) )P
M( M( 7 ) )P
M( M( 13 ) )C: 338193759479             # k = 20644229, Wilfrid Keller (1976)
M( M( 13 ) )C: 210206826754181103207028761697008013415622289
                                        # k = 2^3 * 3^4 * 11 * 512237490733 * 3514316262671725281413641
                                        # Phil Moore, Prime95 ECM, 2003 June 12
M( M( 13 ) )H: 2^55                     # Charles F. Kerchner III, Prime95, stopped
M( M( 13 ) )H: k=2250524799600          # Jocelyn Larouche, MFAC, stopped, 2000 Feb 16
                                        # More trial factoring should be pointless due to:
M( M( 13 ) )H                           # Reto Keiser, Prime95 ECM, stopped, 2002 Apr 26
                                        # ... but ECM is partially random, so more ECM or P-1 is probably worthwhile.
M( M( 13 ) )o: 3e9                      # Warut Roonguthai, Factor95, stopped (no P-1 save file)
M( M( 13 ) )c: 2410                     # Phil Moore, w/Prime95, Maple, & PrimeForm, 2003 June 12
M( M( 17 ) )C: 231733529                # k = 884, Raphael Robinson (1957)
M( M( 17 ) )C: 64296354767              # k = 245273, Wilfrid Keller (1981 Nov 27)
M( M( 17 ) )H: k=17608434819360         # Jocelyn Larouche, MFAC, stopped, 2000 Feb 16
M( M( 17 ) )H                           # Reto Keiser, Prime95 ECM, stopped, 2002 Apr 26
M( M( 17 ) )o: 200000000 4290000000     # Reto Keiser, Prime95 P-1, stopped, 2000 Nov 21, save file avail.
M( M( 17 ) )c: 39438                    # Phil Moore, 2001 January, Chris Nash's Primeform
M( M( 19 ) )C: 62914441                 # k = 60, Raphael Robinson (1957)
M( M( 19 ) )C: 5746991873407            # k = 5480769, Will Edgington - Wilfrid Keller 1994 Aug 20
M( M( 19 ) )C: 824271579602877114508714150039
                                        # Phil Moore, Prime95 ECM 2000 Dec 6
                                        # k = 3*11*199*39509*3029759717908279
M( M( 19 ) )C: 2106734551102073202633922471
                                        # Phil Moore, Prime95 ECM 2003 Mar 20
                                        # k = 3*5*113*112877*10501118807327
M( M( 19 ) )C: 65997004087015989956123720407169
                                        # Phil Moore, Prime95 ECM 2011 Sep 30
                                        # B1=3e6; cofactor composite
M( M( 19 ) )H: 2^60                     # Warut Roonguthai, Prime95, stopped
M( M( 19 ) )H: k=4398054899728          # "
M( M( 19 ) )H                           # Reto Keiser, Prime95 ECM, stopped, 2002 Apr 26
M( M( 19 ) )o: 30000000 1500000000      # Reto Keiser, Prime95 P-1, stopped, 2000 Nov 21, save file avail.
M( M( 19 ) )c: 157749                   # Phil Moore, 2003 Mar 20, Chris Nash's Primeform
M( M( 31 ) )C: 295257526626031          # k = 68745, Wilfrid Keller 1981 Nov 27
M( M( 31 ) )C: 87054709261955177        # k = 20269004, Tony Forbes - Wilfrid Keller 1994 Aug 20
M( M( 31 ) )C: 242557615644693265201    # k = 56474845800, Reto Keiser  1999 Dec 6
M( M( 31 ) )C: 178021379228511215367151 # k = 41448832329225, Ernst Mayer 2005 June 20
M( M( 31 ) )H: k=170000000000000000     # Doublemersennes.org and George Woltman's mmff since 2012 September 1
M( M( 61 ) )U: k=76000000000000000      # Doublemersennes.org and George Woltman's mmff since 2012 September 1
M( M( 89 ) )U: k=7000000000000000       # Doublemersennes.org and George Woltman's mmff since 2012 September 1
M( M( 107 ) )U: k=6000000000000000      # Doublemersennes.org and George Woltman's mmff since 2012 September 1
M( M( 127 ) )U: k=117500000000000000    # Doublemersennes.org and George Woltman's mmff since 2012 September 1
M( M( 521 ) )U: k=156156000000          # Tony Forbes, MFAC, stopped
M( M( 521 ) )U: k=200000000000          # Luigi Morelli, GMP-Double-Mersenne, stopped
M( M( 607 ) )U: k=96096000000           # Tony Forbes, MFAC, stopped
M( M( 607 ) )U: k=200000000000          # Luigi Morelli, GMP-Double-Mersenne, stopped
M( M( 1279 ) )U: k=2001753600           # Reto Keiser, 2004 Feb 6, MFAC 2.29
M( M( 2203 ) )U: k=207243960            # Reto Keiser, 2004 Feb 6, MFAC 2.29
M( M( 2203 ) )U: k=341437005            # LaurV, 2013 Sep 6, PARI and pfgw, stopped
M( M( 2203 ) )U: k=1000000000           # Luigi Morelli, 2015 Oct 22, GMP-Double-Mersenne, stopped
M( M( 2281 ) )U: k=8717474              # James Wanless, unknown program, stopped, 2004 Aug 9
M( M( 2281 ) )U: k=50000000             # Timothy Sorbera, GMP-Double-Mersenne, 2011 Jan 12
M( M( 2281 ) )U: k=400000000            # LaurV, pfgw, 2013 Sep 24
M( M( 3217 ) )U: k=7203992              # Tony Forbes, own program, stopped
M( M( 3217 ) )U: k=100000000            # LaurV, 2013 Oct 3, PARI and pfgw. Stopped.
M( M( 4253 ) )U: k=4697044              # Tony Forbes, own program, stopped
M( M( 4253 ) )U: k=18121640             # LaurV, 2013 Sep 6, PARI and pfgw. Continuing.
M( M( 4423 ) )U: k=5052299              # Tony Forbes, own program, stopped
M( M( 4423 ) )U: k=17258708             # LaurV, 2013 Sep 6, PARI and pfgw. Continuing.
M( M( 9689 ) )U: k=1302840              # Reto Keiser, 2004 Feb 6, MFAC 2.29
M( M( 9689 ) )U: k=3656009              # LaurV, 2013 Sep 6, PARI and pfgw. Continuing.
M( M( 9941 ) )U: k=1329452              # Tony Forbes, own program, stopped
M( M( 9941 ) )U: k=3521045              # LaurV, 2013 Sep 6, PARI and pfgw. Continuing.
M( M( 11213 ) )U: k=863503              # Tony Forbes, own program, stopped
M( M( 11213 ) )U: k=1000000             # Timothy Sorbera, pfgw and GMP-Double-Mersenne, 2011 Jan 2
M( M( 19937 ) )U: k=356320              # Tony Forbes, own program, stopped
M( M( 19937 ) )U: k=610068              # LaurV, 2013 Sep 6, PARI and pfgw. Continuing.
M( M( 21701 ) )U: k=308792              # Tony Forbes, own program, stopped
M( M( 21701 ) )U: k=501524              # LaurV, 2013 Sep 6, PARI and pfgw. Continuing.
M( M( 23209 ) )U: k=566072              # Tony Forbes, own program, stopped
M( M( 23209 ) )U: k=10000000            # Luigi Morelli, 2013 Nov 17, PARI and pfgw. Stopped.
M( M( 44497 ) )U: k=1702545             # Tony Forbes, own program, stopped
M( M( 86243 ) )U: k=546184              # Tony Forbes, own program, stopped, 2001 May 12
M( M( 86243 ) )U: k=1000000             # Timothy Sorbera, pfgw and GMP-Double-Mersenne, 2011 Jan 12
M( M( 110503 ) )U: k=645491             # Tony Forbes, own program, stopped, 2001 May 12
M( M( 110503 ) )U: k=2000000            # Luigi Morelli, Pari and pfgw, stopped 2014 Feb 12
M( M( 132049 ) )U: k=244903             # Tony Forbes, own program, stopped
M( M( 132049 ) )U: k=2000000            # Luigi Morelli, Pari and pfgw, stopped 2014 Feb 05
M( M( 216091 ) )U: k=123376             # Tony Forbes, own program, stopped
M( M( 216091 ) )U: k=1739793            # Serge Batalov, PARI and LLR, stopped 
M( M( 216091 ) )U: k=2000000            # Luigi Morelli, own program and pfgw. Stopped 2014 Jun 26
M( M( 756839 ) )U: k=11588              # Tony Forbes, own program, stopped
M( M( 756839 ) )U: k=2000000            # Luigi Morelli, PARI, own siever and pfgw. Reserved (1,900,000)
M( M( 859433 ) )U: k=10127              # Tony Forbes, own program, stopped
M( M( 859433 ) )U: k=2000000            # Luigi Morelli, PARI, own siever and pfgw. Reserved (600,143)
M( M( 1257787 ) )U: k=1500019           # DoubleMersennes.org, sieved k= 1500020 to   51T  - Continuing.
M( M( 1398269 ) )U: k=1453840           # DoubleMersennes.org, sieved k= 1453841 to   24T  - Continuing.
M( M( 2976221 ) )U: k=110132            # DoubleMersennes.org, sieved k=  110133 to  100T  - Continuing.
M( M( 3021377 ) )U: k=310768            # DoubleMersennes.org, sieved k=  310769 to   14T  - Continuing.
M( M( 6972593 ) )U: k=113500            # DoubleMersennes.org, sieved k=  113501 to   13T  - Continuing.
M( M( 13466917 ) )U: k=100520           # DoubleMersennes.org, sieved k=  100521 to   13T  - Continuing.
M( M( 20996011 ) )U: k=568              # DoubleMersennes.org, sieved k=     569 to   24T  - Continuing.
M( M( 24036583 ) )U: k=67               # DoubleMersennes.org, sieved k=      68 to   75T  - Continuing.
M( M( 25964951 ) )U: k=44               # DoubleMersennes.org, sieved k=      45 to   32T  - Continuing.
M( M( 30402457 ) )U: k=40               # DoubleMersennes.org, sieved k=      41 to   32T  - Continuing.
M( M( 32582657 ) )U: k=59               # DoubleMersennes.org, sieved k=      60 to  100T  - Continuing.
M( M( 37156667 ) )U: k=23               # DoubleMersennes.org, sieved k=      24 to  150T  - Continuing.
M( M( 42643801 ) )U: k=32               # DoubleMersennes.org, sieved k=      33 to  298T  - Continuing.
M( M( 43112609 ) )U: k=200              # DoubleMersennes.org, sieved k=     201 to  400T  - Continuing.
M( M( 57885161 ) )U: k=248              # DoubleMersennes.org, sieved k=     249 to  450T  - Continuing.
M( M( 74207281 ) )U: k=112              # DoubleMersennes.org, sieved k=     113 to  500T  - Continuing.

George Woltman released a fast program, mmff to factor small double mersenne numbers.

Mark Rodenkirch adapted his program to search for double Mersenne numbers up to MM86243.

Ernst W. Mayer developed a siever to attack small k ofthe largest double Mersenne numbers.

Landon Curt Noll was using the calc program to factor M( M( 127 ) ).

Rob Hooft developed a program, mmtrial, which uses freeLIP; it is in the mers package, which is available at this address on Will Edgington's personal web pages .

Conrad Curry's mmfac program is available on his ftp site as mmfac.zip
His ecm3 for DOS, a port of the mers package's ecm3 v4.1, is also there as ecm3.zip.

Tony Forbes maintained a distributerd project to search for factors of 2261-1-1.
His website records his work.

Here is an interesting article written by I.J. Good, titled Conjectures concerning the Mersenne Numbers.

Please send updates, corrections, questions, and new information to me .
Thanks,

 
Luigi Morelli

© MoreWare 2012