427 733 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
17262753374464593413991367903	29	93.8	2019-05-05 18:58:00

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	200 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	3623	0
Verified (Factored)		Marinus van den Heuvel	F613F67DAFEAF623	0
Verified (Factored)		Eivind Triel	F613F67DAFEAF623	120923
Verified (Factored)	2002-02-10	Dennis Pope	F613F67DAFEAF623	136450

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-05-06	artorollo	F514881CC235B376	1	294582	5	3
Verified	2019-05-07	kkmrkkblmbrbk	F514881CC235B376	1	241830	5	3

History

Date	User	Type	Result
2019-05-07	kkmrkkblmbrbk	C-PRP	M427733/17262753374464593413991367903 : F514881CC235B376 PRP: Verified PRP without proof (small exponent)
2019-05-06	artorollo	C-PRP	M427733/17262753374464593413991367903 : F514881CC235B376 PRP: Verified PRP without proof (small exponent)
2019-05-05	alex	F-ECM	Factor: 17262753374464593413991367903 / (ECM curve 80, B1=250000, B2=25000000, Sigma=2567117568394353)
2018-12-11	Gordon Spence	NF	no factor from 2^65 to 2^66
2017-12-21	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-16	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-16	Gordon Spence	NF	no factor from 2^62 to 2^63
2013-01-06	markr	NF-PM1	B1=25000000, B2=1000000000, E=12
2012-12-01	dbaugh	NF	no factor from 2^61 to 2^62
2012-11-27	dbaugh	NF	no factor from 2^60 to 2^61
2012-05-29	Joss	NF-PM1	B1=2997592
2010-08-03	Rob_Dee	NF-PM1	B1=1000000, B2=2000000, E=6
2010-08-02	Rob_Dee	NF-PM1	B1=500000, B2=1000000