27 858 629 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 2⁷⁰

P-1

B1 =	265000
B2 =	1325000

Status	Date	User	Residue	Shift	Software
Verified	2006-02-01	Christian Ketterer	1E51279DBC2A8788	6690476	Windows,Prime95,v23,(aka WZ1)
Verified	2013-09-07	Dubslow	1E51279DBC2A8788	1011886	Linux 64-bit,Prime95,v27.9,build 1

History

Date	User	Type	Result
2024-06-03	LaurV	NF	no factor TF: 69-70
2021-10-07	TheJudger	NF	no factor TF: 74-75
2021-09-12	TheJudger	NF	no factor TF: 73-74
2021-08-23	TheJudger	NF	no factor TF: 72-73
2021-04-29	Sid & Andy	NF	no factor TF: 71-72
2021-03-30	mikr	NF	no factor TF: 70-71
2013-09-07	Dubslow	C-LL	1E51279DBC2A8788
2013-08-30	Architects Cubed	NF	no factor TF: 69-70
2011-11-26	Numberwang	NF	no factor TF: 68-69
2011-09-03	Carsten Kossendey	NF	no factor TF: 67-68
2006-02-01	-anonymous-	C-LL	1E51279DBC2A8788
2005-05-12	-anonymous-	NF-PM1	B1=265000, B2=1325000
2005-01-10	-anonymous-	NF	no factor TF: 1-67
2004-10-03	-anonymous-	NF	no factor TF: 1-62
2001-08-24	Net_Force	NF	no factor TF: 1-56