39 656 503 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 =	1500000
B2 =	45000000

Status	Date	User	Residue	Shift	Software
Verified	2008-01-15	C. Cooper / S. Boone	12615D54842CD29C	34164451	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2017-03-29	Dubslow	12615D54842CD29C	35412373	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-21	James Heinrich	NF	no factor TF: 68-69
2021-05-15	-anonymous-	NF	no factor TF: 74-75
2021-05-05	Sid & Andy	NF-PM1	B1=1500000, B2=45000000
2020-02-23	-anonymous-	NF	no factor TF: 73-74
2019-10-11	-anonymous-	NF	no factor TF: 72-73
2019-07-08	monst	NF	no factor TF: 71-72
2017-03-29	Dubslow	C-LL	12615D54842CD29C
2014-12-14	megavink	NF	no factor TF: 70-71
2014-12-14	megavink	NF	no factor TF: 69-70
2012-09-25	Carsten Kossendey	NF	no factor TF: 68-69
2008-01-15	curtisc	C-LL	12615D54842CD29C
2007-12-03	curtisc	NF-PM1	B1=635000
2006-10-24	James Heinrich	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