38 410 063 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 2⁷²

P-1

B1 =	600000
B2 =	12000000

Status	Date	User	Residue	Shift	Software
Verified	2009-09-25	Mark DeVirgilio	0DFA04DDD99BE8EF	11319619	Windows,Prime95,v24 final,(aka Wc1)
Bad	2016-12-18	EthanD	5B0B719F3D1D9599	22104311	Windows 64-bit,Prime95,v28.9,build 2
Verified	2016-12-31	Dubslow	0DFA04DDD99BE8EF	24392334	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2022-06-20	Sid & Andy	NF	no factor TF: 72-73
2019-02-26	monst	NF	no factor TF: 71-72
2016-12-31	Dubslow	C-LL	0DFA04DDD99BE8EF
2016-12-18	EthanD	C-LL	5B0B719F3D1D9599
2014-12-02	NickOfTime	NF	no factor TF: 70-71
2014-11-23	Mark Rose	NF	no factor TF: 69-70
2014-07-17	HBendtz	NF-PM1	B1=600000, B2=12000000, E=12
2009-09-25	Mark DeVirgilio	C-LL	0DFA04DDD99BE8EF
2007-08-14	-anonymous-	NF-PM1	B1=550000
2006-07-10	Team Prime Rib	NF	no factor TF: 1-69
2003-09-14	-anonymous-	NF	no factor TF: 1-59
2003-09-14	-anonymous-	NF	no factor TF: 1-60