27 812 929 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 =	989000
B2 =	52498000

Status	Date	User	Residue	Shift	Software
Verified	2006-01-15	Alex and Nick Myrman	AA0B1A9F4F191CC9	14007976	Windows,Prime95,v24 final,(aka Wc1)
Verified	2012-08-06	Dubslow	AA0B1A9F4F191CC9	0	CUDALucas v2.04 Beta

History

Date	User	Type	Result
2021-11-19	RichD0	NF-PM1	B1=989000, B2=52498000
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
2021-04-26	Sid & Andy	NF	no factor TF: 71-72
2021-03-28	mikr	NF	no factor TF: 70-71
2017-04-02	ramgeis	NF	no factor TF: 69-70
2012-08-06	Dubslow	C-LL	AA0B1A9F4F191CC9
2011-11-25	bcp19	NF	no factor TF: 68-69
2011-09-05	Carsten Kossendey	NF	no factor TF: 67-68
2006-03-01	-anonymous-	C-LL	AA0B1A9F4F191CC9
2006-01-15	-anonymous-	C-LL	AA0B1A9F4F191CC9
2005-03-20	-anonymous-	NF-PM1	B1=435000
2005-02-12	-anonymous-	NF	no factor TF: 1-67
2004-09-02	-anonymous-	NF	no factor TF: 1-62
2001-08-24	Net_Force	NF	no factor TF: 1-56