38 176 451 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 2⁷¹

P-1

B1 =	615000
B2 =	12000000

Status	Date	User	Residue	Shift	Software
Verified	2007-10-29	Paul Mazumdar	00946411A075759D	23267061	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2016-11-25	Dubslow	00946411A075759D	34651509	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-27	LaurV	NF	no factor TF: 68-69
2022-06-26	RichD0	NF	no factor TF: 72-73
2018-10-12	Architects Cubed	NF	no factor TF: 71-72
2016-11-25	Dubslow	C-LL	00946411A075759D
2014-12-02	monst	NF	no factor TF: 70-71
2014-11-20	Bdot	NF	no factor TF: 69-70
2014-10-08	HBendtz	NF-PM1	B1=615000, B2=12000000, E=12
2013-09-15	Carsten Kossendey	NF	no factor TF: 68-69
2007-10-29	-anonymous-	C-LL	00946411A075759D
2007-09-28	-anonymous-	NF-PM1	B1=610000
2006-06-13	papalanga	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