43 717 231 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 =	470000
B2 =	4935000

Status	Date	User	Residue	Shift	Software
Verified	2009-08-07	-anonymous-	A10527F3E380DF2D	29440293	Windows,Prime95,v25.7,build 1
Verified	2016-06-13	J. Gareth "Kit" Moreton	A10527F3E380DF2D	6850625	Windows 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2018-08-06	-anonymous-	NF	no factor TF: 72-73
2016-06-13	J. Gareth "Kit" Moreton	C-LL	A10527F3E380DF2D
2015-09-27	AirSquirrels	NF	no factor TF: 71-72
2015-09-09	VictordeHollander	NF	no factor TF: 70-71
2015-03-11	LaurV	NF	no factor TF: 69-70
2014-01-27	LaurV	NF	no factor TF: 68-69
2009-08-07	-anonymous-	C-LL	A10527F3E380DF2D
2009-05-30	-anonymous-	NF-PM1	B1=470000, B2=4935000
2007-09-28	-anonymous-	NF	no factor TF: 1-68
2007-09-13	ComputerraRU	NF	no factor TF: 62-63