2 297 573 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶²

TF below 2^76 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	9600000
B2 =	49498834770

ECM

Digits	B1	Curves
25	50000	246 / 280

Estimated T-Level: 24.4 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-11-07	Wim de Lange	72ABEDF11D7A3E8F	0
Verified	1999-03-15	Vaughan Bennett	72ABEDF11D7A3E8F	231004
Verified	2018-04-30	kkmrkkblmbrbk	72ABEDF11D7A3E8F	632229

History

Date	User	Type	Result
2024-03-08	TJAOI	NF	no factor from 2^69 to 2^70
2023-08-25	Sid & Andy	NF-PM1	B1=9600000, B2=49498834770
2023-03-13	Joss	NF-PM1	B1=1000000, B2=6014071140
2023-01-01	Joss	NF-PM1	B1=1000000, B2=571651080
2021-06-10	TJAOI	NF	no factor from 2^68 to 2^69
2019-11-21	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2019-03-25	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-30	kkmrkkblmbrbk	C-LL	72ABEDF11D7A3E8F
2017-05-27	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
2016-02-13	Joss	NF-PM1	B1=405950, B2=4059500, E=6
2015-11-04	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-12	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-12	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-18	Joss	NF-PM1	B1=145872
2014-07-18	Joss	NF-PM1	B1=117936
2013-12-07	Jerry Hallett	NF	no factor from 2^62 to 2^63
2012-05-12	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-17	Oscar Östlin	NF-PM1	B1=90000, B2=1755000, E=6
2010-12-04	Oscar Östlin	NF-PM1	B1=75011
2010-11-15	Joss	NF-PM1	B1=20000
2010-11-07	Joss	NF-PM1	B1=15000
2009-01-15	Sturle Sunde	NF	no factor from 2^60 to 2^61

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