2 612 353 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
64307087817425566455127	23	75.8	2021-07-08 13:44:38

ECM

Digits	B1	Curves
25	50000	121 / 280

Estimated T-Level: 22.2 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1997-11-21	David Burns	093F7991FA89FB08	0
Verified (Factored)	1999-04-23	Matti Kinnunen	093F7991FA89FB08	637251
Verified (Factored)	2018-06-30	kkmrkkblmbrbk	093F7991FA89FB08	2032591

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-07-08	ATH	87B930609DA42BE5	1	499898	5	3

History

Date	User	Type	Result
2021-07-08	GIMPS-PRIM	CERT	PRP Certification Proof certified good
2021-07-08	ATH	C-PRP	M2612353/64307087817425566455127 : 87B930609DA42BE5 PRP proof power = 7 PRP: Verified Proof certified good
2021-07-08	daveward2005	F-ECM	Factor: 64307087817425566455127 / (ECM curve 7, B1=50000, B2=5000000, Sigma=392537930692268)
2021-06-03	TJAOI	NF	no factor from 2^68 to 2^69
2019-10-14	masser	NF-PM1	B1=2612353, B2=26123530, E=12
2019-04-29	TJAOI	NF	no factor from 2^67 to 2^68
2018-06-30	kkmrkkblmbrbk	C-LL	093F7991FA89FB08
2017-08-28	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-10	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-21	Joss	NF-PM1	B1=200000, B2=3600000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-16	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-12	Joss	NF-PM1	B1=124570
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-26	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-12-14	markr	NF-PM1	B1=100000, B2=2125000, E=6
2010-11-17	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61

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