5 473 627 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
12409989355659105292196479	26	83.4	2025-03-21 06:53:18

ECM

Digits	B1	Curves
25	50000	86 / 280

Estimated T-Level: 21.5 ⓘ

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

Status	Date	User	Residue	Shift	Software
Factored	1998-10-25	Goede Schueler/Christoph Steinbeck	B36F26C41A7C8DB4	0	Windows,Prime95,v16,NT service,(aka WS5)
Factored	2000-07-17	Barry Hansen	B36F26C41A7C8DB4	1809722	Windows,Prime95,v20,NT service,(aka WW5)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	Certified Good	2025-03-26	Perig	11EC809D18D65BE7	1	4041261	5	3

History

Date	User	Type	Result
2025-03-26	akaerst	CERT	Proof certified good
2025-03-26	Perig	C-PRP	Proof Certified Good Proof Power: 7
2025-03-21	Andrey Dobrynin	F-ECM	Factor: 12409989355659105292196479 / ECM curve 40, B1=50000, B2=60054225, Edwards Sigma=3951276369628606
2021-10-27	axn	NF-PM1	B1=8000000, B2=400000000
2021-10-13	SRBase	NF	no factor TF: 71-72
2021-08-31	SRBase	NF	no factor TF: 70-71
2021-08-18	SRBase	NF	no factor TF: 69-70
2020-08-31	TJAOI	NF	no factor TF: 68-69
2019-09-21	USAFSS	NF-PM1	B1=330000, B2=9817500
2018-06-29	ramgeis	NF	no factor TF: 67-68
2016-07-04	Gordon Spence	NF	no factor TF: 66-67
2015-08-24	snme2pm1	NF	no factor TF: 65-66
2014-12-30	monst	NF	no factor TF: 64-65
2014-12-30	snme2pm1	NF	no factor TF: 63-64
2010-11-10	Squeeky_Squirrel	NF-PM1	B1=60000, B2=960000, E=6
2009-05-05	GrunwalderGIMP	NF	no factor TF: 62-63
2000-07-17	barryh	C-LL	B36F26C41A7C8DB4
2000-07-03	barryh	NF-PM1	B1=25000, B2=187500
1998-10-25	-anonymous-	C-LL	B36F26C41A7C8DB4
1998-08-24	-anonymous-	NF	no factor TF: 1-62

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