43 681 081 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 2⁷³

TF target 2⁷²

P-1

B1 =	430000
B2 =	2257500

Status	Date	User	Residue	Shift	Software
Bad	2008-11-16	C. Cooper / S. Boone	543A2D702BC31CEA	23789510	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2016-05-24	kkmrkkblmbrbk	BFBA6AF2339685F6	17899873	Linux 64-bit,Prime95,v28.9,build 2
Verified	2016-07-13	-anonymous-	BFBA6AF2339685F6	36964414	Linux 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2018-08-03	-anonymous-	NF	no factor TF: 72-73
2016-07-13	-anonymous-	C-LL	BFBA6AF2339685F6
2016-05-24	kkmrkkblmbrbk	C-LL	BFBA6AF2339685F6
2015-08-07	Sid & Andy	NF	no factor TF: 71-72
2015-07-23	Mark Rose	NF	no factor TF: 70-71
2015-03-17	chalsall	NF	no factor TF: 69-70
2014-01-19	LaurV	NF	no factor TF: 68-69
2008-11-16	curtisc	C-LL	543A2D702BC31CEA
2008-09-06	curtisc	NF-PM1	B1=430000, B2=2257500
2007-09-13	-anonymous-	NF	no factor TF: 1-68