2 618 881 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
869446454998177536120647977	27	89.5	2021-09-23 09:46:31

ECM

Digits	B1	Curves
25	50000	124 / 280

Estimated T-Level: 22.2 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		nmainer	D8C2E9AA3128BDA4	0
Verified (Factored)	1999-07-26	David Lambert	D8C2E9AA3128BDA4	1373862
Verified (Factored)	2018-07-07	kkmrkkblmbrbk	D8C2E9AA3128BDA4	1655357

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-09-25	GAN	FDB20DA09489CC2D	1	302697	5	3

History

Date	User	Type	Result
2021-09-25	WR	CERT	PRP Certification Proof certified good
2021-09-25	GAN	C-PRP	M2618881/869446454998177536120647977 : FDB20DA09489CC2D PRP proof power = 7 PRP: Verified Proof certified good
2021-09-23	GAN	F-ECM	Factor: 869446454998177536120647977 / (ECM curve 2, B1=50000, B2=5000000, Sigma=292322608333763)
2021-05-19	TJAOI	NF	no factor from 2^68 to 2^69
2019-10-14	masser	NF-PM1	B1=2618881, B2=26188810, E=12
2019-04-15	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-07	kkmrkkblmbrbk	C-LL	D8C2E9AA3128BDA4
2017-08-30	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-20	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-23	Joss	NF-PM1	B1=200000, B2=3600000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-17	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-13	Joss	NF-PM1	B1=124508
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-18	markr	NF	no factor from 2^61 to 2^62
2010-12-12	markr	NF-PM1	B1=100000, B2=2125000, E=6
2010-11-17	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61

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