26 409 557 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁵

TF target 2⁷⁰

P-1

B1 =	310000
B2 =	7362500

Status	Date	User	Residue	Shift	Software
Bad	2005-02-18	Jacek Szlauer	9C7473FE05043686	20160189	Windows,Prime95,v23,(aka WZ1)
Verified	2012-04-19	LaurV	060CADF24BE3E1DE	12545246	Windows 64-bit,Prime95,v27.3,build 1
Verified	2012-04-19	Dubslow	060CADF24BE3E1DE	0	CUDALucas v2.00a

History

Date	User	Type	Result
2021-10-17	TheJudger	NF	no factor TF: 74-75
2021-09-30	TheJudger	NF	no factor TF: 73-74
2021-08-25	TheJudger	NF	no factor TF: 72-73
2021-08-25	TheJudger	NF	no factor TF: 71-72
2021-04-25	mikr	NF	no factor TF: 70-71
2017-04-11	ramgeis	NF	no factor TF: 69-70
2012-04-19	Dubslow	C-LL	060CADF24BE3E1DE
2012-04-19	LaurV	C-LL	060CADF24BE3E1DE
2011-11-28	bcp19	NF	no factor TF: 68-69
2011-11-25	Carsten Kossendey	NF	no factor TF: 67-68
2005-02-18	mansky	C-LL	9C7473FE05043686
2004-11-22	mansky	NF-PM1	B1=310000, B2=7362500
2004-08-06	-anonymous-	NF	no factor TF: 1-67
2004-05-11	markr	NF	no factor TF: 1-62