2 602 681 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
2656616403498587483579273	25	81.1	2022-04-07 22:42:02

ECM

Digits	B1	Curves
25	50000	140 / 280

Estimated T-Level: 22.5 ⓘ

TF below 2^70 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Perry Clayton	9C3BDB3F10B11053	0
Verified (Factored)	1999-03-26	Ferdy Keler	9C3BDB3F10B11053	2224253
Verified (Factored)	2018-07-01	kkmrkkblmbrbk	9C3BDB3F10B11053	2361928

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-04-13	mrh	DDF47067585E1321	1	415862	5	3

History

Date	User	Type	Result
2022-04-13	Grace N Smith	CERT	PRP Certification Proof certified good
2022-04-13	mrh	C-PRP	M2602681/2656616403498587483579273 : DDF47067585E1321 PRP proof power = 7 PRP: Verified Proof certified good
2022-04-07	Sergey Nosov	F-ECM	Factor: 2656616403498587483579273 / (ECM curve 2, B1=50000, B2=5000000)
2021-07-01	TJAOI	NF	no factor from 2^68 to 2^69
2019-11-30	masser	NF-PM1	B1=2000000, B2=50000000, E=12
2019-05-20	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-01	kkmrkkblmbrbk	C-LL	9C3BDB3F10B11053
2017-08-24	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-08-24	Joss	NF-PM1	B1=480000, B2=4800000, E=6
2017-08-19	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-04-23	Joss	NF-PM1	B1=200000, B2=6876285, E=12
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-15	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-06	Joss	NF-PM1	B1=124661
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-23	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-12-17	markr	NF-PM1	B1=100000, B2=2100000, E=6
2010-11-16	Joss	NF-PM1	B1=20000
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61

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