72 089 309 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 =	660000
B2 =	13200000

Status	Date	User	Residue	Shift	Software
Bad	2016-08-12	M Mutch	AD3C7E9934A39B4A	20249243	Windows 64-bit,Prime95,v28.7,build 1
Verified	2016-11-29	endless_mike	06295B458943B7A0	27838279	Linux 64-bit,Prime95,v28.9,build 2
Verified	2017-01-19	MadPoo 🙂	06295B458943B7A0	71799032	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2017-01-19	MadPoo 🙂	C-LL	06295B458943B7A0
2016-11-29	endless_mike	C-LL	06295B458943B7A0
2016-08-12	M Mutch	C-LL	AD3C7E9934A39B4A
2016-06-18	-anonymous-	NF	no factor TF: 74-75
2014-08-17	TheJudger	NF-PM1	B1=660000, B2=13200000, E=6
2014-08-10	Chuck	NF	no factor TF: 73-74
2014-08-10	Chuck	NF	no factor TF: 72-73
2014-08-10	Chuck	NF	no factor TF: 71-72
2013-07-11	Manpowre	NF	no factor TF: 70-71
2012-10-01	[DPC] hansR	NF	no factor TF: 69-70
2010-06-02	-anonymous-	NF	no factor TF: 68-69
2010-05-19	unconnected	NF	no factor TF: 67-68
2010-05-16	unconnected	NF	no factor TF: 66-67
2010-05-13	unconnected	NF	no factor TF: 65-66
2010-05-10	SuperNijn	NF	no factor TF: 64-65
2008-09-19	Wojciech Florek	NF	no factor TF: 1-64