38 577 367 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 2⁷²

P-1

B1 =	915000
B2 =	22875000

Status	Date	User	Residue	Shift	Software
Bad	2008-07-04	C. Cooper / S. Boone	7BB2CD80DD6C9B54	16009403	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2016-01-08	MadPoo 🙂	5050E764B0AC9166	5555438	Windows 64-bit,Prime95,v26,(aka We4)
Verified	2016-06-13	Bruno Victal	5050E764B0AC9166	37259998	Linux 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2016-06-13	Bruno Victal	C-LL	5050E764B0AC9166
2016-05-07	Bruno Victal	NF	no factor TF: 74-75
2016-05-05	Bruno Victal	NF-PM1	B1=915000, B2=22875000, E=12
2016-04-11	Bruno Victal	NF	no factor TF: 73-74
2016-03-31	Bruno Victal	NF	no factor TF: 72-73
2016-03-25	Bruno Victal	NF	no factor TF: 71-72
2016-01-08	MadPoo 🙂	C-LL	5050E764B0AC9166
2014-12-05	Chuck	NF	no factor TF: 70-71
2014-08-11	mikr	NF	no factor TF: 69-70
2008-07-04	curtisc	C-LL	7BB2CD80DD6C9B54
2008-06-02	curtisc	NF-PM1	B1=365000, B2=2828750
2006-08-14	subgenius	NF	no factor TF: 1-69
2003-09-14	-anonymous-	NF	no factor TF: 1-60
2003-09-14	-anonymous-	NF	no factor TF: 1-59
2001-03-05	Joss	NF	no factor TF: 1-56