66 921 341 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 =	790000
B2 =	790000

Status	Date	User	Residue	Shift	Software
Bad	2014-07-06	eskifullofbeer	0000000000000002	33467361	CUDALucas v2.05 Beta
Verified	2015-10-29	Bruno Victal	AE0A6A12A4E6E0B9	53424290	CUDALucas v2.05
Verified	2016-01-16	kracker	AE0A6A12A4E6E0B9	47638277	Windows 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2021-01-11	chuenkit	NF	no factor TF: 74-75
2017-04-01	eskifullofbeer	C-LL	0000000000000002
2016-01-16	kracker	C-LL	AE0A6A12A4E6E0B9
2015-10-29	Bruno Victal	C-LL	AE0A6A12A4E6E0B9
2015-07-14	monst	NF	no factor TF: 73-74
2014-07-06	eskifullofbeer	C-LL	0000000000000002
2014-06-06	glyco	NF-PM1	B1=790000
2014-04-06	ktony	NF	no factor TF: 72-73
2014-04-06	ktony	NF	no factor TF: 71-72
2012-09-13	SWL551	NF	no factor TF: 70-71
2012-05-15	ITS	NF	no factor TF: 69-70
2010-04-16	-anonymous-	NF	no factor TF: 68-69
2010-03-17	jomateix	NF	no factor TF: 67-68
2010-03-08	jomateix	NF	no factor TF: 66-67
2010-03-03	jomateix	NF	no factor TF: 65-66
2010-03-02	DeltaBravoKS	NF	no factor TF: 64-65
2009-05-31	1997rj7	NF	no factor TF: 1-64