2 841 691 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
52003729683290988184576471	26	85.4	2021-08-10 17:11:19

ECM

Digits	B1	Curves
25	50000	98 / 280

Estimated T-Level: 21.8 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-04-21	MIT Prime Team	EB853CFD3B8427A9	0
Verified (Factored)	1999-05-02	Deborah Botkin	EB853CFD3B8427A9	1637913
Verified (Factored)	2018-09-14	kkmrkkblmbrbk	EB853CFD3B8427A9	696949

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-08-11	-Anonymous-	14CA8DA456A51FE0	1	1348190	5	3

History

Date	User	Type	Result
2021-08-13	garo	CERT	PRP Certification Proof certified good
2021-08-11	-Anonymous-	C-PRP	M2841691/52003729683290988184576471 : 14CA8DA456A51FE0 PRP proof power = 7 PRP: Verified Proof certified good
2021-08-10	nordi	F-ECM	Factor: 52003729683290988184576471 / (ECM curve 4, B1=50000, B2=6750000, Sigma=5466226936799245)
2021-07-15	TJAOI	NF	no factor from 2^68 to 2^69
2020-02-05	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2019-10-30	masser	NF-PM1	B1=2850000, B2=28500000, E=12
2019-05-21	BigBrother	NF-PM1	B1=1000000, B2=20000000, E=12
2019-01-05	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-14	kkmrkkblmbrbk	C-LL	EB853CFD3B8427A9
2018-09-12	Joss	NF-PM1	B1=656916, B2=1970748
2018-09-05	Joss	NF-PM1	B1=656916
2018-09-03	Joss	NF-PM1	B1=602578
2018-08-30	Joss	NF-PM1	B1=502149
2017-11-04	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-03-11	Joss	NF-PM1	B1=328458, B2=3284580, E=6
2016-11-03	Joss	NF-PM1	B1=273715
2016-10-28	Joss	NF-PM1	B1=190080
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-14	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-01-31	lycorn	NF	no factor from 2^61 to 2^62
2009-02-12	Sturle Sunde	NF	no factor from 2^60 to 2^61

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