4 869 167 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
269161363790609284121	21	67.9	2017-04-15 17:48:54

ECM

Digits	B1	Curves
25	50000	8 / 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
Verified (Factored)		Butch Ethington	A77EFD6421EFE79C	0
Verified (Factored)	1998-06-01	kimon berlin	A77EFD6421EFE79C	0
Verified (Factored)	2000-03-22	Stephan Grupp	A77EFD6421EFE79C	2722684

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-11-20	kkmrkkblmbrbk	28C7D6D9B2322536	1	1759976	5	3
Verified	2018-04-01	Oliver Kruse	28C7D6D9B2322536	1	1225356	5	3

History

Date	User	Type	Result
2018-04-01	Oliver Kruse	C-PRP	M4869167/269161363790609284121 : 28C7D6D9B2322536 PRP: Verified PRP without proof (not generated)
2017-11-20	kkmrkkblmbrbk	C-PRP	M4869167/269161363790609284121 : 28C7D6D9B2322536 PRP: Verified PRP without proof (not generated)
2017-04-15	bam	F-ECM	Factor: 269161363790609284121 / (ECM curve 2, B1=50000, B2=5000000)
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^61
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-07-21	snme2pm1	NF	no factor from 2^65 to 2^66
2015-01-09	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-09	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-12-20	David Campeau	NF-PM1	B1=410000, B2=11070000, E=12
2011-10-09	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-23	markr	NF	no factor from 2^61 to 2^62
2009-08-16	Carsten Kossendey	NF-PM1	B1=30000, B2=435000