3 821 513 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
7142371587306507142729594413130718282047	40	132.4	2021-12-12 03:12:30

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)		John Lloyd	4049F1511B044BD0	0
Verified (Factored)	1999-11-10	Ron Schwanz	4049F1511B044BD0	2110225

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-12-18	Lisander Viaene	89009DC994C95709	1	958499	5	3

P-1 factors

Date	Factor	B1	B2
2021-12-12	7142371587306507142729594413130718282047	15000000	6851145210

History

Date	User	Type	Result
2022-07-17	Joss	NF-PM1	B1=3821513, B2=3849900600
2022-04-06	Joss	NF-PM1	B1=1000000, B2=147585900
2021-12-19	TheDogPrescott	CERT	PRP Certification Proof certified good
2021-12-18	Lisander Viaene	C-PRP	M3821513/7142371587306507142729594413130718282047 : 89009DC994C95709 PRP proof power = 7 PRP: Verified Proof certified good
2021-12-12	axn	F-PM1	Factor: 7142371587306507142729594413130718282047 / (P-1, B1=15000000, B2=6851145210)
2021-01-10	axn	NF-PM1	B1=15000000, B2=750000000
2020-11-22	Carlos Pinho	NF-PM1	B1=172000, B2=4647000, E=6
2020-11-16	TJAOI	NF	no factor from 2^68 to 2^69
2018-10-01	TJAOI	NF	no factor from 2^67 to 2^68
2016-11-17	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-26	ramgeis	NF	no factor from 2^65 to 2^66
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
2016-02-01	Joss	NF-PM1	B1=258667, B2=2586670, E=6
2016-01-31	Joss	NF-PM1	B1=215556, B2=2155560, E=6
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
2014-09-22	Joss	NF-PM1	B1=81795
2012-03-23	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-11-02	Squeeky_Squirrel	NF-PM1	B1=65000, B2=1121250, E=6
2011-03-22	markr	NF	no factor from 2^61 to 2^62
2009-07-24	Carsten Kossendey	NF-PM1	B1=20000, B2=270000
2009-02-26	S485122	NF	no factor from 2^60 to 2^61

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