56 796 631 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 2⁷⁵

TF target 2⁷³

P-1

B1 =	1000000
B2 =	20000000

Status	Date	User	Residue	Shift
Verified	2012-04-09	-Anonymous-	97A4639302C60EED	166198
Verified	2021-05-04	Sergey Nosov	97A4639302C60EED	34274467

History

Date	User	Type	Result
2021-05-04	Sergey Nosov	C-LL	97A4639302C60EED
2019-01-06	Sid & Andy	NF	no factor from 2^74 to 2^75
2018-10-20	Sid & Andy	NF	no factor from 2^73 to 2^74
2018-06-09	Sid & Andy	NF-PM1	B1=1000000, B2=20000000
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^63
2015-12-30	-Anonymous-	NF	no factor from 2^72 to 2^73
2015-11-19	Mark Rose	NF	no factor from 2^71 to 2^72
2012-04-09	-Anonymous-	C-LL	97A4639302C60EED
2012-02-11	-Anonymous-	NF-PM1	B1=780000
2011-06-18	steinrar	NF	no factor from 2^70 to 2^71
2011-06-18	steinrar	NF	no factor from 2^69 to 2^70
2011-04-19	Ralf Recker	NF	no factor from 2^68 to 2^69
2009-05-28	Dr. Nowak	NF	no factor from 2^67 to 2^68
2008-08-15	Sturle Sunde	NF	no factor from 2^66 to 2^67
2008-08-14	Sturle Sunde	NF	no factor from 2^65 to 2^66
2008-08-12	Sturle Sunde	NF	no factor from 2^64 to 2^65
2008-08-10	Sturle Sunde	NF	no factor from 2^63 to 2^64