31 373 437 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 2⁷⁴

TF target 2⁷¹

P-1

B1 =	350000
B2 =	7087500

Status	Date	User	Residue	Shift	Software
Verified	2006-09-04	Matthew Darling	F56A8BFE9B4B75AB	2720724	Windows,Prime95,v24 final,(aka Wc1)
Verified	2013-12-18	Dubslow	F56A8BFE9B4B75AB	23965877	Linux 64-bit,Prime95,v27.9,build 1

History

Date	User	Type	Result
2020-03-16	-anonymous-	NF	no factor TF: 73-74
2019-12-19	Aaron Haviland	NF-PM1	B1=350000, B2=7087500, E=12
2019-12-06	-anonymous-	NF	no factor TF: 71-72
2019-12-06	-anonymous-	NF	no factor TF: 72-73
2019-01-01	ramgeis	NF	no factor TF: 70-71
2013-12-18	Dubslow	C-LL	F56A8BFE9B4B75AB
2013-03-02	bcp19	NF	no factor TF: 69-70
2012-06-30	Jerry Hallett	NF	no factor TF: 68-69
2006-09-04	snowtire	C-LL	F56A8BFE9B4B75AB
2006-02-01	-anonymous-	NF-PM1	B1=475000
2005-10-18	-anonymous-	NF	no factor TF: 1-68
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