38 295 601 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 =	618000
B2 =	12000000

Status	Date	User	Residue	Shift	Software
Verified	2010-04-05	curtisc	6F0FD87111621B1F	18089474	Windows Service,Prime95,v25.8,build 1
Verified	2016-12-07	Dubslow	6F0FD87111621B1F	6097249	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-12-29	-anonymous-	NF	no factor TF: 74-75
2020-02-21	-anonymous-	NF	no factor TF: 73-74
2019-10-19	-anonymous-	NF	no factor TF: 71-72
2019-10-19	-anonymous-	NF	no factor TF: 72-73
2016-12-07	Dubslow	C-LL	6F0FD87111621B1F
2014-12-03	Tim Sorbera	NF	no factor TF: 70-71
2014-11-25	Mark Rose	NF	no factor TF: 69-70
2014-11-24	HBendtz	NF-PM1	B1=618000, B2=12000000, E=12
2013-09-10	Le Comte	NF	no factor TF: 68-69
2010-04-05	curtisc	C-LL	6F0FD87111621B1F
2009-04-18	ANONYMOUS	NF-PM1	B1=615000
2006-07-10	-anonymous-	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