39 587 921 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 =	465000
B2 =	11043750

Status	Date	User	Residue	Shift	Software
Verified	2007-10-17	Robert Beardain	8FE8ED1CC305BA7C	19534762	Windows,Prime95,v24 final,(aka Wc1)
Verified	2017-03-14	Dubslow	8FE8ED1CC305BA7C	27651569	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-30	LaurV	NF	no factor TF: 68-69
2022-05-16	RichD0	NF	no factor TF: 72-73
2019-06-06	monst	NF	no factor TF: 71-72
2017-03-14	Dubslow	C-LL	8FE8ED1CC305BA7C
2014-12-12	ktony	NF	no factor TF: 70-71
2014-12-07	Bdot	NF	no factor TF: 69-70
2013-09-27	Carsten Kossendey	NF	no factor TF: 68-69
2007-10-17	SWR_DMaster	C-LL	8FE8ED1CC305BA7C
2007-08-14	SWR_DMaster	NF-PM1	B1=465000, B2=11043750
2006-10-24	-anonymous-	NF	no factor TF: 1-68
2001-03-05	Joss	NF	no factor TF: 1-56