39 478 583 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 2⁷⁴

TF target 2⁷²

P-1

B1 =	450000
B2 =	7762500

Status	Date	User	Residue	Shift	Software
Verified	2008-03-05	Dolganov S	DA91B170037B8D2C	30075503	Windows,Prime95,v24 final,(aka Wc1)
Verified	2017-03-02	Dubslow	DA91B170037B8D2C	38179850	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-01-31	-anonymous-	NF	no factor TF: 73-74
2019-10-13	-anonymous-	NF	no factor TF: 72-73
2019-07-17	monst	NF	no factor TF: 71-72
2017-03-02	Dubslow	C-LL	DA91B170037B8D2C
2014-12-10	NickOfTime	NF	no factor TF: 70-71
2014-12-05	Bdot	NF	no factor TF: 69-70
2013-09-24	Torben K.	NF	no factor TF: 68-69
2008-03-03	-anonymous-	C-LL	DA91B170037B8D2C
2007-12-31	-anonymous-	NF-PM1	B1=450000, B2=7762500
2006-10-24	Team Prime Rib	NF	no factor TF: 1-68
2003-09-29	-anonymous-	NF	no factor TF: 1-60
2003-09-21	-anonymous-	NF	no factor TF: 1-59
2001-02-25	Joss	NF	no factor TF: 1-56