20 996 009 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 2⁸¹

TF target 2⁶⁹

P-1

B1 =	1000000
B2 =	1000310220

Status	Date	User	Residue	Shift
Verified	2004-10-03	Diogo Martel	2617A5A2268F5C82	9476721
Verified	2008-07-12	Steven H. Norton	2617A5A2268F5C82	720723

Status	Date	User	Residue	Shift	Type	Base
Verified	2023-02-08	Dobri	3741057457F5160D	19124770	1	3

History

Date	User	Type	Result
2023-03-10	Dobri	NF-PM1	B1=1000000, B2=1000310220
2023-02-08	curtisc	CERT	PRP Certification CERT proof power = 8 Proof certified good
2023-02-08	Dobri	C-PRP	3741057457F5160D PRP proof power = 8 PRP: Verified Proof certified good
2022-09-20	Borek	NF	no factor from 2^80 to 2^81
2022-09-18	Borek	NF	no factor from 2^79 to 2^80
2022-09-17	Borek	NF	no factor from 2^78 to 2^79
2022-09-17	Borek	NF	no factor from 2^77 to 2^78
2022-09-15	Borek	NF	no factor from 2^76 to 2^77
2022-09-15	Borek	NF	no factor from 2^75 to 2^76
2022-09-15	Borek	NF	no factor from 2^74 to 2^75
2022-09-15	Borek	NF	no factor from 2^73 to 2^74
2021-11-06	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-09-23	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-07-26	Sid & Andy	NF	no factor from 2^70 to 2^71
2011-10-31	Roman Maznichenko	NF	no factor from 2^69 to 2^70
2011-10-31	Roman Maznichenko	NF	no factor from 2^68 to 2^69
2011-10-31	Roman Maznichenko	NF	no factor from 2^67 to 2^68
2011-10-31	Roman Maznichenko	NF	no factor from 2^66 to 2^67