41 803 987 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 =	485000
B2 =	9215000

Status	Date	User	Residue	Shift	Software
Verified	2008-05-10	Serge Batalov	1C972208192D34FD	2942222	Linux 64-bit,Prime95,v25.6,build 6
Verified	2008-05-22	Serge Batalov	1C972208192D34FD	2942222	Windows,Prime95,v25 beta,(aka Wd1)
Verified	2015-10-24	MadPoo 🙂	1C972208192D34FD	35940793	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2020-01-10	-anonymous-	NF	no factor TF: 73-74
2019-10-05	-anonymous-	NF	no factor TF: 72-73
2015-10-24	MadPoo 🙂	C-LL	1C972208192D34FD
2015-10-01	AirSquirrels	NF	no factor TF: 71-72
2015-01-21	srow7	NF	no factor TF: 70-71
2015-01-09	LaurV	NF	no factor TF: 69-70
2014-02-24	LaurV	NF	no factor TF: 68-69
2008-05-21	Serge Batalov	C-LL	1C972208192D34FD
2008-05-10	Serge Batalov	C-LL	1C972208192D34FD
2008-03-11	Serge Batalov	NF-PM1	B1=485000, B2=9215000
2008-03-11	Serge Batalov	NF-PM1	B1=485000, B2=9215000
2007-04-23	-anonymous-	NF	no factor TF: 1-68