3 672 209 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
3561165645990045138668767	25	81.6	2020-10-18 14:19:49

ECM

Digits	B1	Curves
25	50000	12 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Nunn	9D47711FC2062C01	0
Verified (Factored)	1999-08-16	David W. Walker	9D47711FC2062C01	2692073

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-10-18	mrh	F69031731141E572	1	1927117	5	3

P-1 factors

Date	Factor	B1	B2
2020-10-18	3561165645990045138668767	30000000	600000000

History

Date	User	Type	Result
2022-05-24	Joss	NF-PM1	B1=100000, B2=130364850
2022-03-22	Joss	NF-PM1	B1=100000
2022-03-04	Joss	NF-PM1	B1=90000
2020-10-18	Ben Delo	CERT	PRP Certification Proof certified good
2020-10-18	mrh	C-PRP	M3672209/3561165645990045138668767 : F69031731141E572 PRP proof power = 7 PRP: Verified Proof certified good
2020-10-18	axn	F-PM1	Factor: 3561165645990045138668767 / (P-1, B1=30000000, B2=600000000, E=12)
2018-10-29	TJAOI	NF	no factor from 2^67 to 2^68
2017-01-29	Joss	NF-PM1	B1=167520
2017-01-24	Squeeky_Squirrel	NF-PM1	B1=230000, B2=6842500, E=12
2017-01-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-12-30	Joss	NF-PM1	B1=129600
2016-12-24	Joss	NF-PM1	B1=108000
2016-06-25	Joss	NF-PM1	B1=90000, B2=3285000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-12-24	ramgeis	NF	no factor from 2^65 to 2^66
2015-01-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2012-06-05	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2012-02-08	Squeeky_Squirrel	NF-PM1	B1=90000, B2=1642500, E=6
2011-06-07	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-11	Carsten Kossendey	NF-PM1	B1=20000, B2=260000
2009-03-08	S485122	NF	no factor from 2^60 to 2^61

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