2 828 887 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
556118813689650222982567007	27	88.8	2021-03-21 00:53:13

ECM

Digits	B1	Curves
25	50000	79 / 280

Estimated T-Level: 21.4 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Guy Paquet	2A8866F3FE864390	0
Verified (Factored)	1999-12-23	Andy Kohler	2A8866F3FE864390	1505601
Verified (Factored)	2018-09-09	kkmrkkblmbrbk	2A8866F3FE864390	275169

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-03-21	XZT	F34DA0BE76FE5BC1	1	2450016	5	3

History

Date	User	Type	Result
2021-03-21	Ben Delo	CERT	PRP Certification Proof certified good
2021-03-21	XZT	C-PRP	M2828887/556118813689650222982567007 : F34DA0BE76FE5BC1 PRP proof power = 7 PRP: Verified Proof certified good
2021-03-21	mnd9	F-ECM	Factor: 556118813689650222982567007 / (ECM curve 7, B1=50000, B2=5000000, Sigma=1200186804929627)
2020-01-24	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2019-11-10	masser	NF-PM1	B1=3000000, B2=30000000, E=12
2019-01-04	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-09	kkmrkkblmbrbk	C-LL	2A8866F3FE864390
2017-10-28	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-10-07	Joss	NF-PM1	B1=597196, B2=5971960, E=6
2017-02-25	Joss	NF-PM1	B1=298598, B2=2985980, E=6
2016-12-23	Joss	NF-PM1	B1=207360
2016-12-15	Joss	NF-PM1	B1=172800
2016-09-22	Joss	NF-PM1	B1=120000, B2=3993000
2016-09-21	Joss	NF-PM1	B1=120000, B2=3630000
2016-09-18	Joss	NF-PM1	B1=120000, B2=3300000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-13	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
2012-02-13	markr	NF	no factor from 2^61 to 2^62
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61

Username
Password