56 701 609 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	2012-03-14	Netanias	A74875782A3F070A	16583661
Verified	2021-04-29	Andrey Mitrofanov	A74875782A3F070A	51516388

History

Date	User	Type	Result
2021-04-29	Andrey Mitrofanov	C-LL	A74875782A3F070A
2020-10-10	ViliamF	NF	no factor from 2^74 to 2^75
2018-09-25	Sid & Andy	NF	no factor from 2^73 to 2^74
2018-07-01	Sid & Andy	NF-PM1	B1=1000000, B2=20000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^63
2015-12-31	-Anonymous-	NF	no factor from 2^72 to 2^73
2012-03-14	Netanias	C-LL	A74875782A3F070A
2012-02-01	Netanias	NF-PM1	B1=695000
2011-11-21	Xyzzy	NF	no factor from 2^71 to 2^72
2011-11-21	Xyzzy	NF	no factor from 2^70 to 2^71
2011-11-21	Xyzzy	NF	no factor from 2^69 to 2^70
2011-04-17	Paul Leyland	NF	no factor from 2^68 to 2^69
2009-06-22	-Anonymous-	NF	no factor from 2^67 to 2^68
2008-08-09	James Heinrich	NF	no factor from 2^66 to 2^67
2008-08-07	Sturle Sunde	NF	no factor from 2^65 to 2^66
2008-08-06	Sturle Sunde	NF	no factor from 2^64 to 2^65
2008-08-05	Sturle Sunde	NF	no factor from 2^63 to 2^64