5 494 661 Exponent Status

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁷²

TF target 2⁶⁶

Factored

Factor	Digits	Bits	Date
164037272404727837145236281937	30	97.0	2025-03-23 15:43:55

ECM

Digits	B1	Curves
25	50000	88 / 280

Estimated T-Level: 21.6 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored	1998-10-04	Jordan Conley	D7621E8E92B3CB85	0	Windows,Prime95,v16,(aka WS1)
Factored	2000-08-31	Mark Brown	D7621E8E92B3CB85	1445325	Linux 32-bit,Prime95,v20,(aka WW2)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	Certified Good	2025-03-28	Perig	453D9EA56342E8BC	1	4682199	5	3

History

Date	User	Type	Result
2025-03-28	YoungMoney	CERT	Proof certified good
2025-03-28	Perig	C-PRP	M5494661/164037272404727837145236281937 : 453D9EA56342E8BC Proof Certified Good Proof Power: 7
2025-03-23	fordobr	F-ECM	Factor: 164037272404727837145236281937 / ECM curve 44, B1=50000, B2=45039225, Edwards Sigma=7426944670980194
2021-11-17	axn	NF-PM1	B1=8000000, B2=400000000
2021-09-18	SRBase	NF	no factor TF: 71-72
2021-08-25	SRBase	NF	no factor TF: 70-71
2021-08-18	SRBase	NF	no factor TF: 69-70
2020-08-17	TJAOI	NF	no factor TF: 68-69
2019-09-08	GdS	NF-PM1	B1=200000, B2=6000000
2018-06-07	ramgeis	NF	no factor TF: 67-68
2016-07-10	Gordon Spence	NF	no factor TF: 66-67
2015-08-26	snme2pm1	NF	no factor TF: 65-66
2014-11-20	lycorn	NF	no factor TF: 64-65
2014-11-20	lycorn	NF	no factor TF: 63-64
2010-11-18	Squeeky_Squirrel	NF-PM1	B1=60000, B2=975000, E=6
2009-05-01	GrunwalderGIMP	NF	no factor TF: 62-63
2000-08-31	-anonymous-	C-LL	D7621E8E92B3CB85
2000-07-12	-anonymous-	NF-PM1	B1=25000, B2=225000
1998-10-04	-anonymous-	C-LL	D7621E8E92B3CB85
1998-03-31	Sturle Sunde	NF	no factor TF: 1-62

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