68 296 873 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 =	625000
B2 =	12812500

Status	Date	User	Residue	Shift	Software
Verified	2015-07-26	Kyle Z Schmidt	CC9DBDDB2754905F	30764663	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-07-30	Ryan Propper	CC9DBDDB2754905F	58947346	Linux 64-bit,Prime95,v29.5,(aka Wh8)

History

Date	User	Type	Result
2023-07-30	Ryan Propper	C-LL	CC9DBDDB2754905F
2015-07-26	Kyle Z Schmidt	C-LL	CC9DBDDB2754905F
2015-06-25	Jerry Hallett	NF	no factor TF: 74-75
2014-08-17	TheJudger	NF-PM1	B1=625000, B2=12812500, E=12
2014-08-12	Craig Meyers	NF	no factor TF: 72-74
2014-07-13	RichD0	NF	no factor TF: 71-72
2013-03-31	roemer2201	NF	no factor TF: 70-71
2012-03-09	Per Jessen	NF	no factor TF: 69-70
2010-01-29	David Barley	NF	no factor TF: 68-69
2010-01-25	NoN-StoP	NF	no factor TF: 67-68
2010-01-20	-anonymous-	NF	no factor TF: 66-67
2010-01-14	Stubabe	NF	no factor TF: 65-66
2010-01-14	-anonymous-	NF	no factor TF: 64-65
2008-11-24	1997rj7	NF	no factor TF: 1-64