41 709 623 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 2⁷⁶

TF target 2⁷²

P-1

B1 =	485000
B2 =	9215000

Status	Date	User	Residue	Shift	Software
Bad	2008-06-22	S785165	760E67EB17D6F95B	883733	Windows,Prime95,v24 final,(aka Wc1)
Verified	2016-08-03	rudimeier	0B7863B826E40DDE	38336747	Linux 64-bit,Prime95,v28.9,build 2
Verified	2016-08-11	ATH	0B7863B826E40DDE	20858688	CUDALucas v2.05.1
Verified	2016-10-06	-anonymous-	0B7863B826E40DDE	3975082	Windows,Prime95,v28.7,build 1

History

Date	User	Type	Result
2021-02-13	-anonymous-	NF	no factor TF: 75-76
2021-02-08	-anonymous-	NF	no factor TF: 74-75
2019-12-28	-anonymous-	NF	no factor TF: 73-74
2019-10-05	-anonymous-	NF	no factor TF: 72-73
2016-10-06	-anonymous-	C-LL	0B7863B826E40DDE
2016-08-11	ATH	C-LL	0B7863B826E40DDE
2016-08-03	rudimeier	C-LL	0B7863B826E40DDE
2015-08-24	Greg	NF	no factor TF: 71-72
2015-01-19	Chuck	NF	no factor TF: 70-71
2015-01-05	LaurV	NF	no factor TF: 69-70
2014-02-20	LaurV	NF	no factor TF: 68-69
2008-06-22	-anonymous-	C-LL	760E67EB17D6F95B
2008-03-11	-anonymous-	NF-PM1	B1=485000, B2=9215000
2007-04-07	-anonymous-	NF	no factor TF: 1-68