2 142 773 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: 1 known prime factor

Factored

Factor	Digits	Bits	Date
92919498398024606545378871	26	86.3	2025-09-19 07:40:13

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	128 / 640

Estimated T-Level: 26.0 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Ken Kriesel	D861508C704C0B85	0
Verified (Factored)	1999-04-02	Tim Dennehey	D861508C704C0B85	1232502
Verified (Factored)	2018-04-07	kkmrkkblmbrbk	D861508C704C0B85	479233

History

Date	User	Type	Result
2025-09-19	TJAOI	F-ECM	Factor: 92919498398024606545378871 / (ECM curve 18, B1=250000, B2=643227585, Edwards Sigma=5985621434889885)
2025-06-17	Joss	NF-PM1	B1=10000000, B2=30495202920
2025-03-11	Joss	NF-PM1	B1=10000000, B2=20434912680
2025-02-06	Joss	NF-PM1	B1=10000000, B2=10374622440
2023-02-06	Architects Cubed	NF	no factor from 2^69 to 2^70
2022-12-23	Architects Cubed	NF-PM1	B1=5000000, B2=9896994030
2021-08-02	TJAOI	NF	no factor from 2^68 to 2^69
2019-04-15	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-07	kkmrkkblmbrbk	C-LL	D861508C704C0B85
2017-11-03	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2017-04-27	Joss	NF-PM1	B1=422277, B2=4222770, E=6
2017-04-22	Joss	NF-PM1	B1=351898, B2=3518980, E=6
2016-11-12	Joss	NF-PM1	B1=211138
2016-10-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-06-05	Joss	NF-PM1	B1=175949, B2=5265000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-27	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-28	Joss	NF-PM1	B1=159954
2013-09-07	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-24	James Heinrich	NF-PM1	B1=130000, B2=2632500, E=6
2011-01-13	Joss	NF-PM1	B1=50000
2010-12-30	Joss	NF-PM1	B1=30000
2010-11-02	-Anonymous-	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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