5 138 099 Exponent Status

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁷²

TF target 2⁶⁵

Factored

Factor	Digits	Bits	Date
12323142639729172045247	23	73.4	2025-01-06 01:35:12

ECM

Digits	B1	Curves
25	50000	68 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored	1998-10-04	Mark Olah	924AD1F43DC83161	0	Windows,Prime95,v16,(aka WS1)
Factored	2000-05-17	Ars Technica Team Prime Rib	924AD1F43DC83161	1487551	Windows,Prime95,v19,(aka WV1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	Certified Good	2025-01-12	Jason Lynch	E0A573165EBBE6B6	1	4098586	5	3

History

Date	User	Type	Result
2025-01-12	Zhang Bingbing	CERT	Proof certified good
2025-01-12	Jason Lynch	C-PRP	Proof Certified Good Proof Power: 7
2025-01-06	Andrey Dobrynin	F-ECM	Factor: 12323142639729172045247 / ECM curve 38, B1=50000, B2=27023535, Edwards Sigma=7976934152969244
2024-09-11	Sid & Andy	NF	no factor TF: 71-72
2022-07-14	Sid & Andy	NF-PM1	B1=4000000, B2=10279039680
2022-01-18	mikr	NF	no factor TF: 70-71
2021-09-28	TJAOI	NF	no factor TF: 69-70
2020-10-26	TJAOI	NF	no factor TF: 68-69
2019-04-18	USAFSS	NF-PM1	B1=305000, B2=9683750
2018-06-20	ramgeis	NF	no factor TF: 67-68
2016-05-26	Gordon Spence	NF	no factor TF: 66-67
2016-02-23	Mark Rose	NF	no factor TF: 1-61
2015-08-07	snme2pm1	NF	no factor TF: 65-66
2014-12-16	VictordeHollander	NF	no factor TF: 64-65
2014-12-16	VictordeHollander	NF	no factor TF: 63-64
2009-10-24	S485122	NF	no factor TF: 62-63
2008-12-29	Sturle Sunde	NF	no factor TF: 61-62
2004-01-27	Sturle Sunde	NF-PM1	B1=70000, B2=1435000, E=6
2000-05-17	-anonymous-	C-LL	924AD1F43DC83161
1998-10-04	-anonymous-	C-LL	924AD1F43DC83161

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