43 175 681 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 2⁷⁴

TF target 2⁷²

P-1

B1 =	750000
B2 =	15000000

Status	Date	User	Residue	Shift	Software
Verified	2009-01-06	linded	B9C8D83286699B17	6325096	Windows,Prime95,v25.8,build 5
Bad	2016-02-03	Tha	809AB2287B4C0C6A	35498739	Linux 64-bit,Prime95,v28.7,build 1
Verified	2016-02-05	ATH	B9C8D83286699B17	16257	CUDALucas v2.05.1

History

Date	User	Type	Result
2024-05-24	Jarod McClintock	NF	no factor TF: 68-69
2020-01-10	-anonymous-	NF	no factor TF: 73-74
2019-09-28	Random GPUs	NF	no factor TF: 72-73
2016-02-05	ATH	C-LL	B9C8D83286699B17
2016-02-03	Tha	C-LL	809AB2287B4C0C6A
2016-01-30	Tha	NF-PM1	B1=750000, B2=15000000, E=12
2015-10-08	AirSquirrels	NF	no factor TF: 71-72
2015-09-09	Bruno Victal	NF	no factor TF: 70-71
2015-07-01	Carsten Kossendey	NF	no factor TF: 69-70
2013-01-25	Carsten Kossendey	NF	no factor TF: 68-69
2009-01-06	linded	C-LL	B9C8D83286699B17
2008-07-25	Amperio	NF-PM1	B1=720000
2007-08-14	raymondf	NF	no factor TF: 1-68