30 220 741 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 =	485000
B2 =	9093750

Status	Date	User	Residue	Shift	Software
Verified	2006-02-01	Thomas Erb	C3CDA4BC047EA175	23449766	Linux 32-bit,Prime95,v23,(aka WZ2)
Verified	2013-09-01	Dubslow	C3CDA4BC047EA175	29174139	Linux 64-bit,Prime95,v27.9,build 1

History

Date	User	Type	Result
2020-11-14	-anonymous-	NF	no factor TF: 74-75
2020-10-17	Architects Cubed	NF-PM1	B1=485000, B2=9093750, E=12
2020-04-13	-anonymous-	NF	no factor TF: 73-74
2019-12-20	-anonymous-	NF	no factor TF: 71-72
2019-12-20	-anonymous-	NF	no factor TF: 72-73
2017-08-04	ramgeis	NF	no factor TF: 70-71
2013-09-01	Dubslow	C-LL	C3CDA4BC047EA175
2013-02-23	bcp19	NF	no factor TF: 69-70
2012-02-09	bcp19	NF	no factor TF: 68-69
2006-02-01	-anonymous-	C-LL	C3CDA4BC047EA175
2005-10-18	-anonymous-	NF-PM1	B1=435000
2005-10-18	-anonymous-	NF	no factor TF: 1-68
2005-09-22	-anonymous-	NF	no factor TF: 1-67
2005-01-20	1997rj7	NF	no factor TF: 1-62
2003-06-23	AxelFox	NF	no factor TF: 1-60
2001-09-16	Net_Force	NF	no factor TF: 1-56
2000-11-05	Joss	NF	no factor TF: 1-54