30 198 781 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 2⁷⁵

TF target 2⁷¹

P-1

B1 =	345000
B2 =	7676250

Status	Date	User	Residue	Shift	Software
Verified	2007-02-20	Ahmer Ali	47164F6D8C2EF163	13647139	Windows,Prime95,v24 final,(aka Wc1)
Verified	2013-09-19	Dubslow	47164F6D8C2EF163	29834489	Linux 64-bit,Prime95,v27.9,build 1

History

Date	User	Type	Result
2021-01-05	-anonymous-	NF	no factor TF: 74-75
2020-04-14	-anonymous-	NF	no factor TF: 73-74
2019-12-13	-anonymous-	NF	no factor TF: 71-72
2019-12-13	-anonymous-	NF	no factor TF: 72-73
2017-07-05	ramgeis	NF	no factor TF: 70-71
2013-09-19	Dubslow	C-LL	47164F6D8C2EF163
2013-03-08	tigreroars	NF	no factor TF: 69-70
2012-02-17	megavink	NF	no factor TF: 68-69
2007-02-20	ahmerali	C-LL	47164F6D8C2EF163
2007-01-01	ahmerali	NF-PM1	B1=345000, B2=7676250
2005-09-22	-anonymous-	NF	no factor TF: 1-68
2004-12-13	1997rj7	NF	no factor TF: 1-62
2003-07-06	AxelFox	NF	no factor TF: 1-60
2001-09-16	Net_Force	NF	no factor TF: 1-56
2000-12-07	Alex Kruppa	NF	no factor TF: 1-54