38 423 113 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 =	535000
B2 =	10967500

Status	Date	User	Residue	Shift	Software
Verified	2008-08-07	C. Cooper / S. Boone	C77049B8452A417B	22407279	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2017-01-01	Dubslow	C77049B8452A417B	33053310	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2022-06-18	Sid & Andy	NF	no factor TF: 72-73
2019-03-15	Architects Cubed	NF-PM1	B1=535000, B2=10967500, E=12
2019-03-06	monst	NF	no factor TF: 71-72
2017-01-01	Dubslow	C-LL	C77049B8452A417B
2014-12-09	SWL551	NF	no factor TF: 70-71
2014-11-23	Bdot	NF	no factor TF: 69-70
2013-08-19	Torben K.	NF	no factor TF: 68-69
2008-08-07	curtisc	C-LL	C77049B8452A417B
2008-07-04	curtisc	NF-PM1	B1=615000
2006-07-10	JC_Herles	NF	no factor TF: 1-68
2003-09-14	-anonymous-	NF	no factor TF: 1-60
2003-09-14	-anonymous-	NF	no factor TF: 1-59