30 751 949 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 2⁷¹

P-1

B1 =	380000
B2 =	6935000

Status	Date	User	Residue	Shift	Software
Verified	2008-11-06	WWU-CS	75CCC06570809747	28370895	Linux 32-bit,Prime95,v24 final,(aka Wc2)
Bad	2013-11-19	MikeBerlin	057479F7EEA640AC	0	CUDALucas v2.03
Verified	2013-11-30	Dubslow	75CCC06570809747	22627084	Linux 64-bit,Prime95,v27.9,build 1

History

Date	User	Type	Result
2020-01-06	Architects Cubed	NF-PM1	B1=380000, B2=6935000
2019-12-13	-anonymous-	NF	no factor TF: 71-72
2019-12-13	-anonymous-	NF	no factor TF: 72-73
2018-04-11	ramgeis	NF	no factor TF: 70-71
2013-11-30	Dubslow	C-LL	75CCC06570809747
2013-11-19	MikeBerlin	C-LL	057479F7EEA640AC
2013-03-22	bcp19	NF	no factor TF: 69-70
2012-04-16	bcp19	NF	no factor TF: 68-69
2011-05-20	Ungelovende	NF	no factor TF: 67-68
2008-11-18	WWU-CS	C-LL	75CCC06570809747
2008-11-06	WWU-CS	C-LL	75CCC06570809747
2008-08-26	WWU-CS	NF-PM1	B1=505000
2005-11-01	-anonymous-	NF	no factor TF: 1-67
2003-07-30	AxelFox	NF	no factor TF: 1-60
2000-11-15	Joss	NF	no factor TF: 1-52