38 362 651 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 =	455000
B2 =	11943750

Status	Date	User	Residue	Shift	Software
Bad	2007-06-15	Joachim Lundgren	58E60D1CAD264636	30531357	Windows,Prime95,v24 final,(aka Wc1)
Verified	2010-07-10	Reed_Young	FB566E978D5713F9	19039850	Linux 64-bit,Prime95,v25.9,build 4
Verified	2016-04-05	AirSquirrels	FB566E978D5713F9	0	clLucas v1.04

History

Date	User	Type	Result
2024-05-21	James Heinrich	NF	no factor TF: 68-69
2019-05-27	Sid & Andy	NF	no factor TF: 72-73
2019-02-06	monst	NF	no factor TF: 71-72
2016-04-05	AirSquirrels	C-LL	FB566E978D5713F9
2014-12-03	VictordeHollander	NF	no factor TF: 70-71
2014-11-21	Mark Rose	NF	no factor TF: 69-70
2012-09-25	Carsten Kossendey	NF	no factor TF: 68-69
2010-07-10	Reed_Young	C-LL	FB566E978D5713F9
2007-06-15	ANONYMOUS	C-LL	58E60D1CAD264636
2007-04-23	ANONYMOUS	NF-PM1	B1=455000, B2=11943750
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