43 780 291 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 =	535000
B2 =	14445000

Status	Date	User	Residue	Shift	Software
Bad	2011-03-03	oodaira	28D06A7BB2309FCC	42037304	Windows,Prime95,v25.11,build 2
Verified	2015-11-07	MadPoo 🙂	02F52D4090A3AB03	31403297	Windows 64-bit,Prime95,v26,(aka We4)
Verified	2016-09-05	Mark Rose	02F52D4090A3AB03	18607647	Linux 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2018-08-03	-anonymous-	NF	no factor TF: 72-73
2016-09-05	Mark Rose	C-LL	02F52D4090A3AB03
2015-11-07	MadPoo 🙂	C-LL	02F52D4090A3AB03
2015-08-07	Sid & Andy	NF	no factor TF: 71-72
2015-07-23	Mark Rose	NF	no factor TF: 70-71
2015-03-22	1997rj7	NF	no factor TF: 69-70
2014-04-24	Axelsson	NF	no factor TF: 68-69
2011-03-03	oodaira	C-LL	28D06A7BB2309FCC
2009-09-30	thraco	NF-PM1	B1=535000, B2=14445000, E=6
2007-09-13	TheJudger	NF	no factor TF: 1-68