2 154 389 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
582163527660988608697	21	69.0	2020-02-03 03:26:10

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	164 / 640

Estimated T-Level: 26.3 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Jean-Yves Canart	2D3551472B443B9B	0
Verified (Factored)	1999-02-21	didier.ott	2D3551472B443B9B	859417
Verified (Factored)	2018-04-09	kkmrkkblmbrbk	2D3551472B443B9B	1229881

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-02-03	oodaira	7B2DA15BD3F9A433	1	752	5	3
Verified	2020-02-04	marssystems	7B2DA15BD3F9A433	1	398546	5	3

History

Date	User	Type	Result
2020-02-04	marssystems	C-PRP	M2154389/582163527660988608697 : 7B2DA15BD3F9A433 PRP: Verified PRP without proof (not generated)
2020-02-03	oodaira	C-PRP	M2154389/582163527660988608697 : 7B2DA15BD3F9A433 PRP: Verified PRP without proof (not generated)
2020-02-03	Sergey Nosov	F-ECM	Factor: 582163527660988608697 / (ECM curve 2, B1=50000, B2=5000000)
2019-05-20	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-09	kkmrkkblmbrbk	C-LL	2D3551472B443B9B
2017-12-20	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2016-11-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-09	Joss	NF-PM1	B1=360000, B2=6480000, E=12
2016-03-22	Joss	NF-PM1	B1=269625
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-22	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-22	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-01	Joss	NF-PM1	B1=149792
2013-09-08	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-24	markr	NF-PM1	B1=120000, B2=2340000, E=6
2011-01-15	Joss	NF-PM1	B1=50000
2010-12-30	Joss	NF-PM1	B1=30000
2010-11-03	Joss	NF-PM1	B1=20000
2009-01-06	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-04	Sturle Sunde	NF	no factor from 2^60 to 2^61

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