43 502 383 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 =	530000
B2 =	14707500

Status	Date	User	Residue	Shift	Software
Bad	2008-09-24	Hiroyuki Oodaira	1266126C6DF33D0D	39745646	Linux 32-bit,Prime95,v24 final,(aka Wc2)
Verified	2015-10-23	George Woltman	8925DA71107074BC	21753495	CUDALucas v2.05 Beta
Verified	2016-09-26	MadPoo 🙂	8925DA71107074BC	15629622	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2024-06-28	James Heinrich	NF	no factor TF: 72-73
2020-11-17	Conductor	NF	no factor TF: 72-73
2016-09-26	MadPoo 🙂	C-LL	8925DA71107074BC
2015-10-23	George Woltman	C-LL	8925DA71107074BC
2015-08-21	Sid & Andy	NF	no factor TF: 71-72
2015-04-25	Mark Rose	NF	no factor TF: 70-71
2015-04-09	David Campeau	NF	no factor TF: 69-70
2014-04-06	chalsall	NF	no factor TF: 68-69
2008-09-23	oodaira	C-LL	1266126C6DF33D0D
2008-08-26	oodaira	NF-PM1	B1=530000, B2=14707500
2007-09-13	JC_Herles	NF	no factor TF: 1-68