43 399 481 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 2⁷⁵

TF target 2⁷²

P-1

B1 =	505000
B2 =	10100000

Status	Date	User	Residue	Shift	Software
Bad	2009-03-16	Kyle Z Schmidt	0591C8E46C567E1E	18197500	Windows,Prime95,v24 final,(aka Wc1)
Verified	2016-08-26	Xolotl	022CB91F3FBFB06A	14282244	Linux 64-bit,Prime95,v28.9,build 2
Verified	2017-01-19	MadPoo 🙂	022CB91F3FBFB06A	30133101	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2021-03-04	-anonymous-	NF	no factor TF: 74-75
2020-01-01	-anonymous-	NF	no factor TF: 73-74
2019-09-30	-anonymous-	NF	no factor TF: 72-73
2017-01-19	MadPoo 🙂	C-LL	022CB91F3FBFB06A
2016-08-26	Xolotl	C-LL	022CB91F3FBFB06A
2015-09-18	-anonymous-	NF	no factor TF: 71-72
2015-09-18	-anonymous-	NF	no factor TF: 70-71
2015-03-12	chalsall	NF	no factor TF: 69-70
2014-04-13	dragonbud20	NF	no factor TF: 68-69
2009-03-16	Kyle Z Schmidt	C-LL	0591C8E46C567E1E
2008-11-22	Kyle Z Schmidt	NF-PM1	B1=505000, B2=10100000
2007-09-13	S485122	NF	no factor TF: 1-68