3 951 161 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
1200041158130121090807689370996325241	37	119.9	2022-05-15 21:26:13

ECM

Digits	B1	Curves
25	50000	19 / 280

Estimated T-Level: 20.3 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Alex Healy	1DC91F455D9829AC	0
Verified (Factored)	1999-12-08	Michal Sajdak	1DC91F455D9829AC	2127672

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-05-16	aperson1	1D57C0A766C3871E	1	1494676	5	3

P-1 factors

Date	Factor	B1	B2
2022-05-15	1200041158130121090807689370996325241	500000	113097600

History

Date	User	Type	Result
2022-07-17	Joss	NF-PM1	B1=3951161, B2=3981432000
2022-05-16	curtisc	CERT	PRP Certification Proof certified good
2022-05-16	aperson1	C-PRP	M3951161/1200041158130121090807689370996325241 : 1D57C0A766C3871E PRP proof power = 7 PRP: Verified Proof certified good
2022-05-15	Joss	F-PM1	Factor: 1200041158130121090807689370996325241 / (P-1, B1=500000, B2=113097600)
2021-06-02	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-05-03	axn	NF	no factor from 2^69 to 2^70
2020-11-29	axn	NF	no factor from 2^68 to 2^69
2019-01-07	Yxinity	NF	no factor from 2^67 to 2^68
2017-07-20	Joss	NF-PM1	B1=380160, B2=3801600, E=6
2016-12-11	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-05-04	Joss	NF-PM1	B1=190080, B2=3421440, E=6
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-10	ramgeis	NF	no factor from 2^65 to 2^66
2015-01-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-11-17	Joss	NF-PM1	B1=86244
2012-02-20	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-09-23	Squeeky_Squirrel	NF-PM1	B1=70000, B2=1190000, E=6
2011-03-25	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-08-02	Carsten Kossendey	NF-PM1	B1=20000, B2=285000
2009-01-06	Architects Cubed	NF	no factor from 2^60 to 2^61

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