1 273 033 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶⁰

Factored

Factor	Digits	Bits	Date
245084064419612657303479	24	77.7	2017-12-01 13:38:02

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

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

Status	Date	User	Residue	Shift	Software
Factored		Vincent J. Mooney	2130C4254762332F	0	Windows 16-bit,Prime95,v11,(aka WB)
Factored		Simon Burge	2130C4254762332F	0	Crandall,(aka X)
Factored		Brian J. Beesley	2130C4254762332F	190964	Linux 32-bit,Prime95,v24 final,(aka Wc2)
Factored	2016-06-01	MadPoo 🙂	2130C4254762332F	797323	Windows 64-bit,Prime95,v26,(aka We4)

Status	Proof	Date	User	Residue	Shift	Type	Base
Factored	Certified Good Power=6	2025-09-01	Kriesel	C52D0141F7120859	0	1	3

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-12-01	storm5510	C52D0141F7120859	1	305772	5	3
Verified	PRP without proof (not generated)	2017-12-02	kkmrkkblmbrbk	C52D0141F7120859	1	1208195	5	3

History

Date	User	Type	Result
2025-09-02	MarktheDip	CERT	Proof certified good
2025-09-01	Kriesel	C-PRP	C52D0141F7120859 Proof Certified Good Proof Power: 6
2017-12-02	kkmrkkblmbrbk	C-PRP	M1273033/245084064419612657303479 : C52D0141F7120859
2017-12-01	storm5510	C-PRP	M1273033/245084064419612657303479 : C52D0141F7120859
2017-12-01	TJAOI	F-ECM	Factor: 245084064419612657303479
2016-08-27	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-08-03	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-06-01	MadPoo 🙂	C-LL	2130C4254762332F
2016-02-23	Mark Rose	NF	no factor TF: 58-60
2015-09-24	ramgeis	NF	no factor TF: 65-66
2015-04-11	monst	NF	no factor TF: 64-65
2015-04-10	omylist	NF	no factor TF: 63-64
2013-10-07	David Campeau	NF-PM1	B1=1195000, B2=34655000, E=12
2012-10-18	dbaugh	NF	no factor TF: 62-63
2012-09-15	Axelsson	NF	no factor TF: 61-62
2009-02-16	Sturle Sunde	NF	no factor TF: 60-61
2003-06-17	-anonymous-	NF	no factor TF: 1-58
2003-06-06	-anonymous-	NF	no factor TF: 1-58
2003-02-24	-anonymous-	NF-PM1	B1=2048, B2=204800, E=12
2001-11-10	-anonymous-	NF	no factor TF: 1-57
1999-07-27	-anonymous-	NF	no factor TF: 1-56

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