2 151 647 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
51699510554237706632873	23	75.5	2020-10-29 21:59:34

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	162 / 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)		James Gant	4BF602185F67221E	0
Verified (Factored)	1999-02-14	Stephen Wood	4BF602185F67221E	205403
Verified (Factored)	2018-04-09	kkmrkkblmbrbk	4BF602185F67221E	1274676

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-11-01	arnaud	3E5045DB59F6489C	1	355651	5	3

History

Date	User	Type	Result
2020-11-01	curtisc	CERT	PRP Certification Proof certified good
2020-11-01	arnaud	C-PRP	M2151647/51699510554237706632873 : 3E5045DB59F6489C PRP proof power = 7 PRP: Verified Proof certified good
2020-10-29	Nesowa	F-ECM	Factor: 51699510554237706632873 / (ECM curve 6, B1=50000, B2=5000000, Sigma=1131922946984692)
2019-07-12	Dylan Delgado	NF-PM1	B1=5000000, B2=500000000, E=12
2019-05-20	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-09	kkmrkkblmbrbk	C-LL	4BF602185F67221E
2017-12-10	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2017-11-17	Joss	NF-PM1	B1=648000, B2=10950971, E=12
2017-10-04	Joss	NF-PM1	B1=540000, B2=5400000, E=6
2016-11-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-05-01	Joss	NF-PM1	B1=270000, B2=9955429, E=12
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
2013-09-08	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-24	James Heinrich	NF-PM1	B1=135000, B2=2666250, 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
2009-01-07	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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