43 709 903 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 2⁷⁴

TF target 2⁷²

P-1

B1 =	2000000
B2 =	100000000

Status	Date	User	Residue	Shift	Software
Verified	2009-11-12	mersenne_bgwt	AA268465E1F781A5	26434700	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2009-11-12	curtisc	AA268465E1F781A5	9783556	Windows Service,Prime95,v25.8,build 1
Verified	2015-07-11	MadPoo 🙂	AA268465E1F781A5	23566571	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2015-07-11	MadPoo 🙂	C-LL	AA268465E1F781A5
2015-05-19	BloodIce	NF	no factor TF: 73-74
2015-05-14	BloodIce	NF-PM1	B1=2000000, B2=100000000, E=12
2015-05-07	BloodIce	NF	no factor TF: 72-73
2015-05-07	BloodIce	NF	no factor TF: 71-72
2015-05-06	BloodIce	NF	no factor TF: 70-71
2014-12-26	monst	NF	no factor TF: 69-70
2014-04-23	Gordon Spence	NF	no factor TF: 68-69
2009-11-12	curtisc	C-LL	AA268465E1F781A5
2009-11-12	mersenne_bgwt	C-LL	AA268465E1F781A5
2009-05-05	mersenne_bgwt	NF-PM1	B1=730000
2007-09-13	Team Prime Rib	NF	no factor TF: 1-68