2 392 571 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
1395268819057691277839	22	70.2	2015-06-26 11:35:36

ECM

Digits	B1	Curves
25	50000	69 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-05-23	Tom Cage	D6F38FDF35482740	0
Verified (Factored)	1999-03-26	Mark L. DeVirgilio	D6F38FDF35482740	440393

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-12	Oliver Kruse	58693E6B4053566A	1	955810	5	3
Verified	2017-11-26	kkmrkkblmbrbk	58693E6B4053566A	1	350120	5	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-26	kkmrkkblmbrbk	C-PRP	M2392571/1395268819057691277839 : 58693E6B4053566A PRP: Verified PRP without proof (not generated)
2017-10-12	Oliver Kruse	C-PRP	M2392571/1395268819057691277839 : 58693E6B4053566A PRP: Verified PRP without proof (not generated)
2015-06-26	guru	F-ECM	Factor: 1395268819057691277839 / (ECM curve 2, B1=50000, B2=5000000)
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-11-06	Joss	NF-PM1	B1=143652
2014-08-21	Joss	NF-PM1	B1=116826
2013-12-04	Jerry Hallett	NF	no factor from 2^62 to 2^63
2012-06-02	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-22	Oscar Östlin	NF-PM1	B1=90000, B2=1845000, E=6
2011-01-01	Oscar Östlin	NF-PM1	B1=75011
2010-12-16	Joss	NF-PM1	B1=20000
2009-01-17	Sturle Sunde	NF	no factor from 2^60 to 2^61