41 218 607 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 =	490000
B2 =	11882500

Status	Date	User	Residue	Shift	Software
Bad	2009-08-22	DrRocket	CF5B783C6CB7FF0E	13173979	Windows,Prime95,v25.7,build 3
Verified	2016-06-10	Sid & Andy	BBDE9518F2E35DF3	37002422	Windows 64-bit,Prime95,v28.6,build 1
Verified	2016-06-30	ATH	BBDE9518F2E35DF3	20625249	CUDALucas v2.05.1

History

Date	User	Type	Result
2016-06-30	ATH	C-LL	BBDE9518F2E35DF3
2016-06-10	Sid & Andy	C-LL	BBDE9518F2E35DF3
2016-05-22	Bruno Victal	NF	no factor TF: 73-74
2016-05-22	Bruno Victal	NF	no factor TF: 72-73
2015-07-19	ixfd64	NF	no factor TF: 71-72
2015-01-06	chalsall	NF	no factor TF: 70-71
2014-12-29	1997rj7	NF	no factor TF: 69-70
2013-12-02	Torben K.	NF	no factor TF: 68-69
2009-08-22	DrRocket	C-LL	CF5B783C6CB7FF0E
2009-06-07	DrRocket	NF-PM1	B1=490000, B2=11882500
2007-12-31	ITS	NF	no factor TF: 1-68
2007-12-03	-anonymous-	NF	no factor TF: 1-68