2 817 421 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
665547649852780673970143	24	79.1	2021-06-06 22:25:51

ECM

Digits	B1	Curves
25	50000	82 / 280

Estimated T-Level: 21.5 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-07-29	Peter Captijn	9973D37151A97C6E	0
Verified (Factored)	1999-05-02	Andreas Henschke	9973D37151A97C6E	2174332
Verified (Factored)	2018-09-06	kkmrkkblmbrbk	9973D37151A97C6E	2349266

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-06-07	tottenhoff	6D7D742CE64E1A54	1	1262401	5	3

History

Date	User	Type	Result
2021-06-07	curtisc	CERT	PRP Certification Proof certified good
2021-06-07	tottenhoff	C-PRP	M2817421/665547649852780673970143 : 6D7D742CE64E1A54 PRP proof power = 7 PRP: Verified Proof certified good
2021-06-06	kutens	F-ECM	Factor: 665547649852780673970143 / (ECM curve 3, B1=50000, B2=5000000, Sigma=3050360735420129)
2021-05-19	TJAOI	NF	no factor from 2^68 to 2^69
2020-01-15	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2019-10-03	masser	NF-PM1	B1=2817421, B2=28174210, E=12
2019-01-01	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-06	kkmrkkblmbrbk	C-LL	9973D37151A97C6E
2018-09-03	Joss	NF-PM1	B1=499280
2017-10-24	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-03-16	Joss	NF-PM1	B1=336067, B2=3360670, E=6
2017-01-10	Joss	NF-PM1	B1=233380
2016-12-20	Joss	NF-PM1	B1=194484
2016-09-21	Joss	NF-PM1	B1=135059, B2=3630000
2016-09-12	Joss	NF-PM1	B1=135059, B2=3300000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-02-12	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-02-21	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-02-12	Sturle Sunde	NF	no factor from 2^60 to 2^61

Username
Password