67 838 443 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 2⁷⁴

P-1

B1 =	610000
B2 =	12047500

Status	Date	User	Residue	Shift	Software
Verified	2015-10-27	Kyle Z Schmidt	684CA86640B70BFA	2268099	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-07-03	Ryan Propper	684CA86640B70BFA	61134	Linux 64-bit,Prime95,v29.5,(aka Wh8)

History

Date	User	Type	Result
2023-07-03	Ryan Propper	C-LL	684CA86640B70BFA
2015-10-27	Kyle Z Schmidt	C-LL	684CA86640B70BFA
2015-09-28	JC	NF	no factor TF: 74-75
2015-03-02	Syntony	NF-PM1	B1=610000, B2=12047500, E=6
2014-06-18	ktony	NF	no factor TF: 73-74
2014-06-18	ktony	NF	no factor TF: 72-73
2014-06-17	ktony	NF	no factor TF: 71-72
2012-09-23	Cow_tipping	NF	no factor TF: 70-71
2012-03-06	ITS	NF	no factor TF: 69-70
2010-06-08	eon_blue_apocalypse	NF	no factor TF: 68-69
2010-06-05	eon_blue_apocalypse	NF	no factor TF: 67-68
2010-06-04	arnaud	NF	no factor TF: 66-67
2010-05-16	carlos56	NF	no factor TF: 65-66
2010-05-07	carlos56	NF	no factor TF: 64-65
2008-12-26	Wojciech Florek	NF	no factor TF: 63-64