41 471 879 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 2⁷³

TF target 2⁷²

P-1

B1 =	475000
B2 =	8193750

Status	Date	User	Residue	Shift	Software
Bad	2008-09-16	Ivan Stamenkovic	F3E63FAB9602E01E	23671191	Windows,Prime95,v24 final,(aka Wc1)
Verified	2015-07-31	Greg	141F1F56214BF2DF	32888230	CUDALucas v2.05 Beta
Verified	2017-07-01	-anonymous-	141F1F56214BF2DF	8257326	Windows 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2022-05-11	RichD0	NF	no factor TF: 72-73
2017-07-01	-anonymous-	C-LL	141F1F56214BF2DF
2015-07-31	Greg	C-LL	141F1F56214BF2DF
2015-07-27	Mark Rose	NF	no factor TF: 71-72
2015-01-12	chalsall	NF	no factor TF: 70-71
2015-01-09	Mark Rose	NF	no factor TF: 69-70
2014-02-13	LaurV	NF	no factor TF: 68-69
2008-08-26	Ivan Stamenkovic	C-LL	F3E63FAB9602E01E
2008-08-07	Ivan Stamenkovic	NF-PM1	B1=475000, B2=8193750
2007-05-12	ITS	NF	no factor TF: 1-68