3 393 067 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
266060685914221954348079	24	77.8	2021-05-27 02:07:49

ECM

Digits	B1	Curves
25	50000	35 / 280

Estimated T-Level: 20.6 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Bad	1998-03-17	Chionh Wei Peng	059BA7E269ECCB38	0
Verified (Factored)	1999-08-16	Stephen Wood	0A7A0CE47FA2F692	1220751
Verified (Factored)	2000-01-12	Thomas F. Dely	0A7A0CE47FA2F692	2729122

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-05-27	LOBES	E94261B015314855	1	3293153	5	3

History

Date	User	Type	Result
2022-04-06	Joss	NF-PM1	B1=1000000, B2=123342450
2021-05-27	Chang Chia-Tche	CERT	PRP Certification Proof certified good
2021-05-27	LOBES	C-PRP	M3393067/266060685914221954348079 : E94261B015314855 PRP proof power = 7 PRP: Verified Proof certified good
2021-05-27	nordi	F-ECM	Factor: 266060685914221954348079 / (ECM curve 6, B1=50000, B2=6800000, Sigma=2560981239515616)
2018-09-17	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-07-22	Joss	NF-PM1	B1=302354, B2=8745000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-10-28	Squeeky_Squirrel	NF-PM1	B1=165000, B2=4372500, E=6
2015-04-04	Gordon Spence	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-13	Joss	NF-PM1	B1=97832
2014-07-04	Joss	NF-PM1	B1=78916
2012-11-15	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-23	USAFSS	NF-PM1	B1=60000, B2=945000, E=6
2011-08-19	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-10	Carsten Kossendey	NF-PM1	B1=15000, B2=206250
2009-03-25	S485122	NF	no factor from 2^60 to 2^61