2 554 247 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
5559142929657179356827647	25	82.2	2020-07-04 12:58:25

ECM

Digits	B1	Curves
25	50000	42 / 280

Estimated T-Level: 20.8 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Dax Mickelson	19698C2F85D7DF7A	0
Verified (Factored)	1999-04-02	Ethan Hansen	19698C2F85D7DF7A	1873880
Verified (Factored)	2018-06-12	kkmrkkblmbrbk	19698C2F85D7DF7A	807828

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-04	M Miller	87589DDC750627A2	1	2095802	5	3
Verified	2020-07-05	marssystems	87589DDC750627A2	1	1100376	5	3

History

Date	User	Type	Result
2020-07-05	marssystems	C-PRP	M2554247/5559142929657179356827647 : 87589DDC750627A2 PRP: Verified PRP without proof (not generated)
2020-07-04	M Miller	C-PRP	M2554247/5559142929657179356827647 : 87589DDC750627A2 PRP: Verified PRP without proof (not generated)
2020-07-04	GAN	F-ECM	Factor: 5559142929657179356827647 / (ECM curve 3, B1=50000, B2=5000000, Sigma=8752358190299644)
2019-06-10	TJAOI	NF	no factor from 2^67 to 2^68
2018-06-12	kkmrkkblmbrbk	C-LL	19698C2F85D7DF7A
2017-08-10	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-03-29	mikr	NF-PM1	B1=3200000, B2=112000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-04	omylist	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-16	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-04-09	James Heinrich	NF-PM1	B1=175000, B2=4068750, E=6
2011-01-09	Joss	NF-PM1	B1=50000
2011-01-03	Joss	NF-PM1	B1=30000
2010-12-19	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61