38 410 013 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 =	400000
B2 =	12000000

Status	Date	User	Residue	Shift	Software
Verified	2010-07-10	Reed_Young	762F6FA3B03B4E2D	16092067	Linux 64-bit,Prime95,v25.9,build 4
Verified	2016-12-18	Zr40	762F6FA3B03B4E2D	5767176	Mac OS X 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
2016-12-18	Zr40	C-LL	762F6FA3B03B4E2D
2016-05-12	HBendtz	NF-PM1	B1=400000, B2=12000000, E=12
2014-12-04	chalsall	NF	no factor TF: 70-71
2014-11-23	Mark Rose	NF	no factor TF: 69-70
2013-08-11	kracker	NF	no factor TF: 68-69
2010-07-10	Reed_Young	C-LL	762F6FA3B03B4E2D
2007-04-23	-anonymous-	NF-PM1	B1=615000
2006-07-10	-anonymous-	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