2 125 801 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
427461968542411008522807721	27	88.5	2021-03-21 19:30:41

ECM

Digits	B1	Curves
25	50000	157 / 280

Estimated T-Level: 22.8 ⓘ

TF below 2^71 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		R. S. Margulies	076A89FDEE37EA47	0
Verified (Factored)	1999-06-15	MIT dept. of Univ. of Jyvaskyla	076A89FDEE37EA47	1438355
Verified (Factored)	2018-04-05	kkmrkkblmbrbk	076A89FDEE37EA47	1737348

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-03-22	mrh	3DC77C24A34E1767	1	2090093	5	3

History

Date	User	Type	Result
2021-03-22	MathEnthousiast	CERT	PRP Certification Proof certified good
2021-03-22	mrh	C-PRP	M2125801/427461968542411008522807721 : 3DC77C24A34E1767 PRP proof power = 7 PRP: Verified Proof certified good
2021-03-21	mnd9	F-ECM	Factor: 427461968542411008522807721 / (ECM curve 6, B1=50000, B2=5000000, Sigma=373126837242495)
2019-05-06	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-05	kkmrkkblmbrbk	C-LL	076A89FDEE37EA47
2017-09-06	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2017-08-30	Joss	NF-PM1	B1=504000, B2=5040000, E=6
2017-08-19	Joss	NF-PM1	B1=420000, B2=4200000, E=6
2016-10-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-06-25	Joss	NF-PM1	B1=210000, B2=6090000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-01-06	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-09-06	ramgeis	NF	no factor from 2^62 to 2^63
2012-04-03	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-25	James Heinrich	NF-PM1	B1=140000, B2=3045000, E=6
2011-01-11	Joss	NF-PM1	B1=50000
2011-01-01	Joss	NF-PM1	B1=30000
2009-08-03	USAFSS	NF-PM1	B1=20000, B2=265000
2009-01-04	Sturle Sunde	NF	no factor from 2^60 to 2^61

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