1 942 901 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

1942901

Factored

Factor	Digits	Bits	Date
721576479318567986327	21	69.3	2022-04-07 05:01:28
2652909130450667826377	22	71.2	2018-02-28 12:59:33

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Charles F. Kerchner III	3E252FC20D72387F	0
Verified (Factored)	1999-01-17	Trevor Fast	3E252FC20D72387F	59527
Verified (Factored)	2015-06-28	MadPoo	3E252FC20D72387F	1276745

PRP Cofactor

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2018-03-01	Chang Chia-Tche	5707E0BDE0529287	1	1781852	5	3
Verified (Factored)	2018-03-05	Oliver Kruse	5707E0BDE0529287	1	1784138	5	3
Verified	2022-04-09	aperson1	5707E0BDE0529287	2	416477	5	3
Verified	2022-04-09	_p95holder_	5707E0BDE0529287	2	102834	5	3

P-1 factors

Date	Factor	B1	B2
2018-02-28	2652909130450667826377	1942901	113248640

History

Date	User	Type	Result
2022-04-09	_p95holder_	C-PRP	M1942901/2652909130450667826377/721576479318567986327 : 5707E0BDE0529287 PRP: Verified PRP without proof (not generated)
2022-04-09	Hang	CERT	PRP Certification Proof certified good
2022-04-09	aperson1	C-PRP	M1942901/721576479318567986327/2652909130450667826377 : 5707E0BDE0529287 PRP proof power = 7 PRP: Verified Proof certified good
2022-04-07	_p95holder_	F-ECM	Factor: 721576479318567986327 / (ECM curve 1, B1=50000, B2=5000000)
2018-03-05	Oliver Kruse	C-PRP	M1942901/2652909130450667826377 : 5707E0BDE0529287 PRP: Verified PRP without proof (not generated)
2018-03-01	Chang Chia-Tche	C-PRP	M1942901/2652909130450667826377 : 5707E0BDE0529287 PRP: Verified PRP without proof (not generated)
2018-02-28	Joss	F-PM1	Factor: 2652909130450667826377 / (P-1, B1=1942901, B2=113248640, E=12)
2018-02-11	Joss	NF-PM1	B1=1942901, B2=56624320, E=12
2018-02-04	Joss	NF-PM1	B1=1942901, B2=28312160, E=12
2017-11-03	TJAOI	NF	no factor from 2^66 to 2^67
2017-04-12	Joss	NF-PM1	B1=1415608, B2=14156080, E=12
2017-01-04	Joss	NF-PM1	B1=983062
2016-12-24	Joss	NF-PM1	B1=819219
2016-12-16	Joss	NF-PM1	B1=682683
2016-12-15	Joss	NF-PM1	B1=568903
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-10-08	Bruno Victal	NF-PM1	B1=500000, B2=15000000, E=12
2015-09-05	ramgeis	NF	no factor from 2^65 to 2^66
2015-06-28	MadPoo	C-LL	3E252FC20D72387F
2015-05-05	lycorn	NF	no factor from 2^64 to 2^65
2015-05-05	lycorn	NF	no factor from 2^63 to 2^64
2011-12-12	markr	NF-PM1	B1=275000, B2=6000000, E=12
2011-08-27	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-01-26	S485122	NF	no factor from 2^60 to 2^61

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