3 218 261 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
141967274908396430089657	24	76.9	2021-08-10 05:23:27

ECM

Digits	B1	Curves
25	50000	61 / 280

Estimated T-Level: 21.1 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Dax Prather	3FCEDA230C33C4B7	0
Verified (Factored)	1998-07-05	Michael Hanscho	3FCEDA230C33C4B7	0
Verified (Factored)	1999-10-21	Dennis Jørgensen	3FCEDA230C33C4B7	82482

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-08-13	/r/counting	977E82C32983F94C	1	476006	5	3
Verified	2021-08-13	GAN	977E82C32983F94C	1	2439924	5	3

History

Date	User	Type	Result
2022-09-11	Joss	NF-PM1	B1=1000000, B2=241175550
2022-03-11	Joss	NF-PM1	B1=1000000, B2=134343300
2021-08-14	Ben Delo	CERT	PRP Certification Proof certified good
2021-08-13	GAN	C-PRP	M3218261/141967274908396430089657 : 977E82C32983F94C PRP proof power = 7 PRP: Verified Proof certified good
2021-08-13	curtisc	CERT	PRP Certification Proof certified good
2021-08-13	/r/counting	C-PRP	M3218261/141967274908396430089657 : 977E82C32983F94C PRP proof power = 7 PRP: Verified Proof certified good
2021-08-10	GAN	F-ECM	Factor: 141967274908396430089657 / (ECM curve 4, B1=50000, B2=5000000)
2021-01-28	ViliamF	NF	no factor from 2^68 to 2^69
2020-02-22	mikr	NF-PM1	B1=4000000, B2=150000000, E=12
2019-01-07	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-17	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-05-12	Joss	NF-PM1	B1=351421, B2=6325578, E=6
2015-12-14	Squeeky_Squirrel	NF-PM1	B1=155000, B2=3952500, E=6
2015-06-24	Tha	NF	no factor from 2^65 to 2^66
2015-02-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-29	Joss	NF-PM1	B1=99888
2014-06-03	Joss	NF-PM1	B1=79944
2013-01-03	dbaugh	NF	no factor from 2^62 to 2^63
2011-10-20	markr	NF	no factor to 2^62
2011-09-25	USAFSS	NF-PM1	B1=60000, B2=1035000, E=6
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=191250
2009-04-07	S485122	NF	no factor from 2^60 to 2^61

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