3 288 209 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
479234015457755754102920647	27	88.6	2021-03-28 11:32:17

ECM

Digits	B1	Curves
25	50000	34 / 280

Estimated T-Level: 20.6 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Dax Prather	12B469CEB8A9DA14	0
Verified (Factored)	1998-06-28	Charley Kline	12B469CEB8A9DA14	0
Verified (Factored)	1999-06-26	Smegheads	12B469CEB8A9DA14	216757

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-03-29	Chad Steenerson	92BC47E4F11B246C	1	1490191	5	3

History

Date	User	Type	Result
2022-09-12	Joss	NF-PM1	B1=1000000, B2=241152450
2022-03-24	Joss	NF-PM1	B1=1000000, B2=134316000
2021-03-30	riccardo uberti	NF-PM1	B1=5000000, B2=100000000, E=12
2021-03-29	Ben Delo	CERT	PRP Certification Proof certified good
2021-03-29	Chad Steenerson	C-PRP	M3288209/479234015457755754102920647 : 92BC47E4F11B246C PRP proof power = 7 PRP: Verified Proof certified good
2021-03-28	daveward2005	F-ECM	Factor: 479234015457755754102920647 / (ECM curve 5, B1=50000, B2=5000000, Sigma=1227333288311166)
2018-11-19	TJAOI	NF	no factor from 2^67 to 2^68
2017-04-07	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-01-26	Joss	NF-PM1	B1=383400, B2=3834000, E=6
2015-06-29	Tha	NF	no factor from 2^65 to 2^66
2015-02-07	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-07	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-10	Joss	NF-PM1	B1=99038
2014-06-26	-Anonymous-	NF-PM1	B1=79519
2012-12-30	dbaugh	NF	no factor from 2^62 to 2^63
2011-09-26	markr	NF	no factor from 2^61 to 2^62
2011-09-23	USAFSS	NF-PM1	B1=60000, B2=1065000, E=6
2009-07-09	Carsten Kossendey	NF-PM1	B1=15000, B2=191250
2009-04-02	S485122	NF	no factor from 2^60 to 2^61