5 505 779 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
2422366480069234633120124017	28	91.0	2025-03-26 01:57:58

ECM

Digits	B1	Curves
25	50000	40 / 280

Estimated T-Level: 20.7 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored	1999-09-22	Duncan Frissell	BA3AE95927062BCB	3578840	Windows,Prime95,v18,(aka WU1)
Factored	2000-07-25	Stephen Wood	BA3AE95927062BCB	899233	Linux 32-bit,Prime95,v20,(aka WW2)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	Certified Good	2025-04-01	mrh	E184175DD1933851	1	2291591	5	3

History

Date	User	Type	Result
2025-04-01	Jason Lynch	CERT	Proof certified good
2025-04-01	mrh	C-PRP	M5505779/2422366480069234633120124017 : E184175DD1933851 Proof Certified Good Proof Power: 7
2025-03-26	fordobr	F-ECM	Factor: 2422366480069234633120124017 / ECM curve 16, B1=50000, B2=64857975, Edwards Sigma=879763200730779
2022-09-08	Sid & Andy	NF-PM1	B1=7000000, B2=5996001660
2021-10-13	SRBase	NF	no factor TF: 71-72
2021-08-24	SRBase	NF	no factor TF: 70-71
2021-08-19	SRBase	NF	no factor TF: 69-70
2020-11-15	Dylan Delgado	NF-PM1	B1=1000000, B2=20000000
2020-08-31	TJAOI	NF	no factor TF: 68-69
2019-09-08	GdS	NF-PM1	B1=200000, B2=6000000
2018-07-05	ramgeis	NF	no factor TF: 67-68
2016-07-14	Gordon Spence	NF	no factor TF: 66-67
2015-08-30	snme2pm1	NF	no factor TF: 65-66
2014-12-03	monst	NF	no factor TF: 64-65
2014-12-02	Nesowa	NF	no factor TF: 63-64
2010-04-29	Squeeky_Squirrel	NF-PM1	B1=60000, B2=1035000, E=6
2009-05-01	GrunwalderGIMP	NF	no factor TF: 62-63
2000-07-25	Stephen Wood	C-LL	BA3AE95927062BCB
2000-07-17	Stephen Wood	NF-PM1	B1=20000, B2=20000
1999-09-22	-anonymous-	C-LL	BA3AE95927062BCB
1998-03-31	Sturle Sunde	NF	no factor TF: 1-62

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