66 863 851 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

TF

No factors below 2⁷⁶

TF target 2⁷⁴

P-1

B1 =	600000
B2 =	11100000

Status	Date	User	Residue	Shift
Bad	2014-12-15	alkoch	D398EF1784375A37	49125102
Verified	2023-04-11	Ryan Propper	D647AFF8700533E9	52528381
Verified	2023-04-21	MadPoo	D647AFF8700533E9	33052979

History

Date	User	Type	Result
2023-04-21	MadPoo	C-LL	D647AFF8700533E9
2023-04-11	Ryan Propper	C-LL	D647AFF8700533E9
2021-07-19	Ayczly	NF	no factor from 2^75 to 2^76
2021-07-19	Ayczly	NF	no factor from 2^74 to 2^75
2014-12-15	alkoch	C-LL	D398EF1784375A37
2013-10-04	Youcef L	NF-PM1	B1=600000, B2=11100000
2013-09-26	Jerry Hallett	NF	no factor from 2^73 to 2^74
2013-09-18	Jerry Hallett	NF	no factor from 2^72 to 2^73
2013-04-05	Brian V.	NF	no factor from 2^71 to 2^72
2013-04-05	Brian V.	NF	no factor from 2^70 to 2^71
2012-07-27	kdgehman	NF	no factor from 2^69 to 2^70
2010-02-19	ITS	NF	no factor from 2^68 to 2^69
2010-02-14	ITS	NF	no factor from 2^67 to 2^68
2010-02-09	Torchwood Institute	NF	no factor from 2^66 to 2^67
2010-02-06	Sturle Sunde	NF	no factor from 2^65 to 2^66
2010-02-05	Hoca	NF	no factor from 2^64 to 2^65
2009-05-10	1997rj7	NF	no factor to 2^64