2 365 439 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
556228993102971901770679	24	78.9	2020-12-31 12:15:23

ECM

Digits	B1	Curves
25	50000	114 / 280

Estimated T-Level: 22.0 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Lloyd	92A29C1B5CC32F49	0
Verified (Factored)	1999-03-15	Sergio E. Martinez	92A29C1B5CC32F49	23078
Verified (Factored)	2018-05-11	kkmrkkblmbrbk	92A29C1B5CC32F49	1014521

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-01-01	Niels_Mache_Nextcloud	B616A35BEB71D013	1	1474137	5	3

History

Date	User	Type	Result
2021-01-01	Ben Delo	CERT	PRP Certification Proof certified good
2021-01-01	Niels_Mache_Nextcloud	C-PRP	M2365439/556228993102971901770679 : B616A35BEB71D013 PRP proof power = 7 PRP: Verified Proof certified good
2020-12-31	rextherunt	F-ECM	Factor: 556228993102971901770679 / (ECM curve 5, B1=50000, B2=5000000)
2019-04-15	TJAOI	NF	no factor from 2^67 to 2^68
2018-05-11	kkmrkkblmbrbk	C-LL	92A29C1B5CC32F49
2017-06-16	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-10-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-09-09	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2015-03-09	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-09	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-10	Joss	NF-PM1	B1=127134
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-30	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-12-30	markr	NF-PM1	B1=100000, B2=2025000, E=6
2010-11-03	Joss	NF-PM1	B1=20000
2009-01-14	Sturle Sunde	NF	no factor from 2^60 to 2^61