3 851 423 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
717160282818175697067887	24	79.2	2022-05-07 00:33:43
1270906611822972637922999	25	80.1	2022-05-07 00:33:42

ECM

Digits	B1	Curves
25	50000	27 / 280

Estimated T-Level: 20.5 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Newhall	D99A15F6EA85890B	0
Verified (Factored)	1999-12-23	Robin Stevens	D99A15F6EA85890B	550241

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-05-10	aperson1	9571A4F87EDAE708	2	2257324	5	3

P-1 factors

Date	Factor	B1	B2
2022-05-07	1270906611822972637922999	8700000	44721426750
2022-05-07	717160282818175697067887	8700000	44721426750

History

Date	User	Type	Result
2022-05-10	ANONYMOUS	CERT	PRP Certification Proof certified good
2022-05-10	aperson1	C-PRP	M3851423/717160282818175697067887/1270906611822972637922999 : 9571A4F87EDAE708 PRP proof power = 7 PRP: Verified Proof certified good
2022-05-07	DRobinsonPE	F-PM1	Factor: 911443745170452494127588972927122482625981633113 / (P-1, B1=8700000, B2=44721426750)
2022-01-30	Joss	NF	no factor from 2^69 to 2^70
2022-01-30	Joss	NF-PM1	B1=1000000, B2=1035311550
2020-10-26	TJAOI	NF	no factor from 2^68 to 2^69
2019-02-08	Yxinity	NF	no factor from 2^67 to 2^68
2016-11-22	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-03-07	ramgeis	NF	no factor from 2^65 to 2^66
2016-03-02	Joss	NF-PM1	B1=250905, B2=4516290, 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
2015-01-11	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-11	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-19	Joss	NF-PM1	B1=86665
2012-02-20	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-23	Squeeky_Squirrel	NF-PM1	B1=70000, B2=1137500, E=6
2011-03-02	markr	NF	no factor from 2^61 to 2^62
2009-07-27	Carsten Kossendey	NF-PM1	B1=20000, B2=270000
2009-02-25	S485122	NF	no factor from 2^60 to 2^61

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