38 294 549 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 =	410000
B2 =	4817500

Status	Date	User	Residue	Shift	Software
Verified	2007-08-14	Brandon Harris	8DED60E837DDB735	31970690	Windows,Prime95,v25 beta,(aka Wd1)
Verified	2016-12-07	Dubslow	8DED60E837DDB735	35512038	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-12-26	-anonymous-	NF	no factor TF: 74-75
2020-02-21	-anonymous-	NF	no factor TF: 73-74
2019-10-25	-anonymous-	NF	no factor TF: 72-73
2019-10-25	-anonymous-	NF	no factor TF: 71-72
2016-12-07	Dubslow	C-LL	8DED60E837DDB735
2014-12-03	Tim Sorbera	NF	no factor TF: 70-71
2014-11-19	Architects Cubed	NF	no factor TF: 69-70
2013-08-19	Torben K.	NF	no factor TF: 68-69
2007-08-14	BranMuffin	C-LL	8DED60E837DDB735
2007-07-24	BranMuffin	NF-PM1	B1=410000, B2=4817500
2006-12-18	-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