31 276 079 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 2⁷¹

P-1

B1 =	380000
B2 =	8645000

Status	Date	User	Residue	Shift	Software
Bad	2006-04-14	grizzly	3B3B0D86294C62B7	19197090	Windows,Prime95,v24 final,(aka Wc1)
Verified	2007-05-12	Sturle Sunde	2607E35CB6529E0B	19749048	Linux 32-bit,Prime95,v24 final,(aka Wc2)
Verified	2013-12-18	Dubslow	2607E35CB6529E0B	25888492	Linux 64-bit,Prime95,v27.9,build 1

History

Date	User	Type	Result
2024-05-21	James Heinrich	NF	no factor TF: 68-69
2021-10-04	TheJudger	NF	no factor TF: 74-75
2020-03-27	-anonymous-	NF	no factor TF: 73-74
2019-12-06	-anonymous-	NF	no factor TF: 72-73
2019-12-06	-anonymous-	NF	no factor TF: 71-72
2018-12-01	ramgeis	NF	no factor TF: 70-71
2013-12-18	Dubslow	C-LL	2607E35CB6529E0B
2013-02-21	David Campeau	NF	no factor TF: 69-70
2012-07-26	Carsten Kossendey	NF	no factor TF: 68-69
2011-05-27	Ungelovende	NF	no factor TF: 67-68
2007-05-12	Sturle Sunde	C-LL	2607E35CB6529E0B
2006-04-14	-anonymous-	C-LL	3B3B0D86294C62B7
2006-02-01	-anonymous-	NF-PM1	B1=380000, B2=8645000
2005-09-22	TheJudger	NF	no factor TF: 1-67
2003-07-06	-anonymous-	NF	no factor TF: 1-59
2003-06-06	Joss	NF	no factor TF: 1-58
2001-08-31	Net_Force	NF	no factor TF: 1-56
2001-01-14	Joss	NF	no factor TF: 1-52