2 226 251 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
414901951563666406151287	24	78.5	2020-07-02 04:53:28

ECM

Digits	B1	Curves
25	50000	82 / 280

Estimated T-Level: 21.5 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		John Lloyd	9D73BD56C0ABA470	0
Verified (Factored)	1999-02-21	Alex Outhred	9D73BD56C0ABA470	178063
Verified (Factored)	2018-04-19	kkmrkkblmbrbk	9D73BD56C0ABA470	889988

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-04	atrench	98DE456652291B41	1	820465	5	3
Verified	2020-08-12	Justine V.	98DE456652291B41	1	1228959	5	3

History

Date	User	Type	Result
2020-08-12	Justine V.	C-PRP	M2226251/414901951563666406151287 : 98DE456652291B41 PRP: Verified PRP without proof (not generated)
2020-07-04	atrench	C-PRP	M2226251/414901951563666406151287 : 98DE456652291B41 PRP: Verified PRP without proof (not generated)
2020-07-02	GAN	F-ECM	Factor: 414901951563666406151287 / (ECM curve 3, B1=50000, B2=5000000, Sigma=3479966784248000)
2019-04-15	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-19	kkmrkkblmbrbk	C-LL	9D73BD56C0ABA470
2016-12-23	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-25	Alexander Dubrovin	NF-PM1	B1=2000000, B2=65000000, E=12
2015-11-22	Alexander Dubrovin	NF-PM1	B1=1600000, B2=7000000, E=6
2015-11-22	Alexander Dubrovin	NF-PM1	B1=1000000, B2=5000000, E=6
2015-10-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-05-04	Squeeky_Squirrel	NF-PM1	B1=160000, B2=4600000, E=6
2015-03-06	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-06	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-29	Joss	NF-PM1	B1=142662
2014-05-26	Joss	NF-PM1	B1=113831
2013-12-03	LaurV	NF	no factor from 2^62 to 2^63
2012-04-19	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-13	Oscar Östlin	NF-PM1	B1=85000, B2=1593750, E=6
2010-10-22	Oscar Östlin	NF-PM1	B1=75011
2009-01-10	Sturle Sunde	NF	no factor from 2^60 to 2^61

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