43 714 607 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 =	830000
B2 =	21000000

Status	Date	User	Residue	Shift	Software
Verified	2011-05-26	LaurV	40995A54E7494D67	27773763	Windows 64-bit,Prime95,v26.5,build 5
Bad	2017-02-26	Xolotl	0000000000000000	1845183	Linux 64-bit,Prime95,v28.9,build 2
Bad	2017-02-26	Xolotl	0000000000000000	25479375	Linux 64-bit,Prime95,v28.9,build 2
Verified	2017-03-03	MadPoo 🙂	40995A54E7494D67	889601	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2018-08-05	-anonymous-	NF	no factor TF: 72-73
2018-06-23	riccardo uberti	NF-PM1	B1=830000, B2=21000000, E=12
2017-03-03	MadPoo 🙂	C-LL	40995A54E7494D67
2017-02-26	Xolotl	C-LL	0000000000000000
2017-02-26	Xolotl	C-LL	0000000000000000
2015-04-18	LaurV	NF	no factor TF: 71-72
2015-04-18	LaurV	NF	no factor TF: 70-71
2015-04-06	LaurV	NF	no factor TF: 69-70
2014-04-21	Axelsson	NF	no factor TF: 68-69
2011-05-26	LaurV	C-LL	40995A54E7494D67
2009-12-21	Branislav Capo	NF-PM1	B1=515000, B2=11973750
2007-09-13	tmorrow	NF	no factor TF: 1-68