2 156 897 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

No factors below 2⁶⁹

TF target 2⁶²

TF below 2^74 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	5000000
B2 =	9896994030

ECM

Digits	B1	Curves
25	50000	204 / 280

Estimated T-Level: 23.6 ⓘ

Status	Date	User	Residue	Shift
Verified		John Lyon	E5A82D4AC56F4C38	0
Verified	1999-02-07	Martijn Otto	E5A82D4AC56F4C38	2104684
Verified	2018-04-10	kkmrkkblmbrbk	E5A82D4AC56F4C38	1605972

History

Date	User	Type	Result
2023-01-04	Architects Cubed	NF-PM1	B1=5000000, B2=9896994030
2021-07-29	TJAOI	NF	no factor from 2^68 to 2^69
2021-06-24	Dylan Delgado	NF-PM1	B1=4800000, B2=676800000
2019-09-26	mikr	NF-PM1	B1=4000000, B2=200000000, E=12
2019-05-13	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-10	kkmrkkblmbrbk	C-LL	E5A82D4AC56F4C38
2017-09-19	Joss	NF-PM1	B1=576000, B2=5760000, E=6
2017-09-13	Joss	NF-PM1	B1=480000, B2=4800000, E=6
2016-11-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-16	Joss	NF-PM1	B1=240000, B2=8842980, 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
2014-10-03	Joss	NF-PM1	B1=149758
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
2010-11-10	Joss	NF-PM1	B1=60000
2010-11-07	Joss	NF-PM1	B1=45000
2010-11-07	Joss	NF-PM1	B1=30000
2010-11-04	Joss	NF-PM1	B1=15000
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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