1 837 481 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

No factors below 2⁶⁸

TF target 2⁶¹

TF below 2^81 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	25000000
B2 =	69219381000

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	130 / 640

Estimated T-Level: 26.0 ⓘ

Status	Date	User	Residue	Shift
Verified		John Gilmore	2CF42D793B3D2209	0
Verified	1998-12-21	Scott Fohey	2CF42D793B3D2209	178138
Verified	2015-07-16	MadPoo	2CF42D793B3D2209	578716

History

Date	User	Type	Result
2023-11-09	kurly	NF-PM1	B1=25000000, B2=69219381000
2023-06-08	Joss	NF-PM1	B1=1837481, B2=8775937170
2023-01-09	Joss	NF-PM1	B1=1837481, B2=1643601960
2022-10-30	masser	NF-PP1	Start=2/7, B1=800000, B2=25600000
2022-10-29	masser	NF-PP1	Start=6/5, B1=400000, B2=10800000
2022-10-27	masser	NF-PP1	Start=74/13, B1=200000, B2=4400000
2019-06-17	TJAOI	NF	no factor from 2^67 to 2^68
2018-08-13	Joss	NF-PM1	B1=1837481, B2=183748100, E=12
2018-01-22	TJAOI	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2015-09-05	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-16	MadPoo	C-LL	2CF42D793B3D2209
2015-07-02	mikr	NF-PM1	B1=2780000, B2=91760000, E=12
2015-04-26	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-26	snme2pm1	NF	no factor from 2^63 to 2^64
2014-09-22	Joss	NF-PM1	B1=169862
2014-05-19	Joss	NF-PM1	B1=134931
2011-02-07	Carsten Kossendey	NF-PM1	B1=100000, B2=1675000, E=6
2011-01-21	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-16	Architects Cubed	NF	no factor from 2^60 to 2^61

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