38 294 617 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 =	460000
B2 =	12765000

Status	Date	User	Residue	Shift	Software
Verified	2007-09-13	MoZ	28CFC00C56D08C5D	23765457	Windows 64-bit,Prime95,v24 final,(aka Wc4)
Verified	2016-12-07	Dubslow	28CFC00C56D08C5D	6525197	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-12-26	-anonymous-	NF	no factor TF: 74-75
2020-02-21	-anonymous-	NF	no factor TF: 73-74
2019-10-25	-anonymous-	NF	no factor TF: 72-73
2019-10-25	-anonymous-	NF	no factor TF: 71-72
2016-12-07	Dubslow	C-LL	28CFC00C56D08C5D
2014-12-03	Tim Sorbera	NF	no factor TF: 70-71
2014-11-19	Architects Cubed	NF	no factor TF: 69-70
2013-08-19	Torben K.	NF	no factor TF: 68-69
2007-09-13	MoZ	C-LL	28CFC00C56D08C5D
2007-07-24	MoZ	NF-PM1	B1=460000, B2=12765000
2006-07-10	Team Prime Rib	NF	no factor TF: 1-68
2003-09-14	-anonymous-	NF	no factor TF: 1-59
2003-09-09	-anonymous-	NF	no factor TF: 1-60