6 994 997 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
87339947102858436187321	23	76.2	2021-12-06 10:54:25

ECM

Digits	B1	Curves
25	50000	6 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Bad	1999-07-04	Bernard Hill	98042A820DACD809	2985482
Verified (Factored)	2001-11-14	Mark Kroska	3AEDDE96EE673D93	3199761
Verified (Factored)	2002-01-08	Stephen A Bremner	3AEDDE96EE673D93	168127

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-12-12	LaurV	F3542B08A7083AF4	1	2074560	5	3

P-1 factors

Date	Factor	B1	B2
2021-12-06	87339947102858436187321	2000000	258626550

History

Date	User	Type	Result
2021-12-12	Cosmos95	CERT	PRP Certification Proof certified good
2021-12-12	LaurV	C-PRP	M6994997/87339947102858436187321 : F3542B08A7083AF4 PRP proof power = 8 PRP: Verified Proof certified good
2021-12-06	Seth_Tr	F-PM1	Factor: 87339947102858436187321 / (P-1, B1=2000000, B2=258626550)
2021-11-09	Seth_Tr	NF-PM1	B1=3000000, B2=75000000, E=12
2021-09-26	SRBase	NF	no factor from 2^71 to 2^72
2020-09-20	takahashi	NF	no factor from 2^70 to 2^71
2020-07-26	takahashi	NF	no factor from 2^69 to 2^70
2020-04-03	TJAOI	NF	no factor from 2^68 to 2^69
2018-02-26	-Anonymous-	NF	no factor from 2^67 to 2^68
2016-04-27	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-07-03	VictordeHollander	NF	no factor from 2^65 to 2^66
2014-02-14	lycorn	NF	no factor from 2^64 to 2^65
2014-02-09	Nesowa	NF	no factor from 2^63 to 2^64
2011-09-08	Carsten Kossendey	NF-PM1	B1=445000, B2=13572500, E=12