2 607 139 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
351072073581723979217243983	27	88.2	2020-12-18 15:25:20

ECM

Digits	B1	Curves
25	50000	77 / 280

Estimated T-Level: 21.4 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Rich Harms	5899833595D3342A	0
Verified (Factored)	1999-04-02	Zach Bean	5899833595D3342A	1285323
Verified (Factored)	2018-06-28	kkmrkkblmbrbk	5899833595D3342A	2176647

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-12-18	SRJ2877	C55247249CDB004E	1	221175	5	3

History

Date	User	Type	Result
2020-12-18	Simon Josefsson	CERT	PRP Certification Proof certified good
2020-12-18	SRJ2877	C-PRP	M2607139/351072073581723979217243983 : C55247249CDB004E PRP proof power = 7 PRP: Verified Proof certified good
2020-12-18	Zenzoma	F-ECM	Factor: 351072073581723979217243983 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7147240267965205)
2019-12-06	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2019-12-03	masser	NF-PM1	B1=2000000, B2=50000000, E=12
2019-05-13	TJAOI	NF	no factor from 2^67 to 2^68
2018-06-28	kkmrkkblmbrbk	C-LL	5899833595D3342A
2017-08-24	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-10	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-17	Joss	NF-PM1	B1=200000, B2=3600000, E=6
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
2014-10-10	Joss	NF-PM1	B1=124619
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-24	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-12-15	markr	NF-PM1	B1=100000, B2=2125000, E=6
2010-11-16	Joss	NF-PM1	B1=20000
2009-01-27	Sturle Sunde	NF	no factor from 2^60 to 2^61

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