27 563 257 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 =	656000
B2 =	38929000

Status	Date	User	Residue	Shift	Software
Verified	2005-08-01	robert	F5172AE1158DDEC9	7506634	Windows,Prime95,v23,(aka WZ1)
Verified	2011-08-22	Reed_Young	F5172AE1158DDEC9	17449870	Linux 64-bit,Prime95,v25.9,build 4

History

Date	User	Type	Result
2021-10-11	TheJudger	NF	no factor TF: 74-75
2021-09-12	TheJudger	NF	no factor TF: 73-74
2021-08-24	TheJudger	NF	no factor TF: 72-73
2021-08-22	TheJudger	NF	no factor TF: 71-72
2021-04-09	Architects Cubed	NF-PM1	B1=656000, B2=38929000
2021-03-19	mikr	NF	no factor TF: 70-71
2018-09-21	ramgeis	NF	no factor TF: 69-70
2018-04-19	VictordeHollander	NF	no factor TF: 68-69
2015-07-06	Nesowa	NF	no factor TF: 67-68
2011-08-22	Reed_Young	C-LL	F5172AE1158DDEC9
2005-08-01	-anonymous-	C-LL	F5172AE1158DDEC9
2005-04-26	-anonymous-	NF-PM1	B1=420000
2004-11-22	Team Prime Rib	NF	no factor TF: 1-67
2004-08-06	1997rj7	NF	no factor TF: 1-62
2001-08-24	Net_Force	NF	no factor TF: 1-56