39 637 811 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 2⁷⁶

TF target 2⁷²

P-1

B1 =	1500000
B2 =	45000000

Status	Date	User	Residue	Shift	Software
Bad	2008-01-15	C. Cooper / S. Boone	E1AF9B73CC52C214	20678443	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2016-05-18	George Woltman	82296AEA3280862B	3844602	Mac OS X 64-bit,Prime95,v28.7,build 1
Verified	2016-06-03	AirSquirrels	82296AEA3280862B	135520	CUDALucas v2.05.1

History

Date	User	Type	Result
2024-05-30	LaurV	NF	no factor TF: 68-69
2021-05-20	-anonymous-	NF	no factor TF: 75-76
2021-05-14	-anonymous-	NF	no factor TF: 74-75
2021-04-22	Sid & Andy	NF-PM1	B1=1500000, B2=45000000
2020-02-14	-anonymous-	NF	no factor TF: 73-74
2019-10-12	-anonymous-	NF	no factor TF: 72-73
2019-07-25	monst	NF	no factor TF: 71-72
2016-06-03	AirSquirrels	C-LL	82296AEA3280862B
2016-05-18	George Woltman	C-LL	82296AEA3280862B
2014-12-14	megavink	NF	no factor TF: 70-71
2014-12-14	megavink	NF	no factor TF: 69-70
2013-10-01	Carsten Kossendey	NF	no factor TF: 68-69
2008-01-15	curtisc	C-LL	E1AF9B73CC52C214
2007-08-14	curtisc	NF-PM1	B1=635000
2006-10-24	-anonymous-	NF	no factor TF: 1-68
2002-02-17	Joss	NF	no factor TF: 1-57
2001-01-28	Joss	NF	no factor TF: 1-56