3 666 253 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
27128564212677881199959	23	74.5	2021-06-30 05:24:51

ECM

Digits	B1	Curves
25	50000	13 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ethan Hansen	3DB5795F087D99A4	0
Verified (Factored)	1999-11-17	Hank Jones	3DB5795F087D99A4	1198911

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-07-01	tottenhoff	0CD52BF383E4980C	1	1598362	5	3

History

Date	User	Type	Result
2022-05-25	Joss	NF-PM1	B1=100000, B2=130364850
2022-03-22	Joss	NF-PM1	B1=100000
2022-03-04	Joss	NF-PM1	B1=90000
2021-07-01	James Heinrich	CERT	PRP Certification Proof certified good
2021-07-01	tottenhoff	C-PRP	M3666253/27128564212677881199959 : 0CD52BF383E4980C PRP proof power = 7 PRP: Verified Proof certified good
2021-06-30	kutens	F-ECM	Factor: 27128564212677881199959 / (ECM curve 1, B1=50000, B2=6800000, Sigma=3380460560617966)
2021-02-23	axn	NF	no factor from 2^69 to 2^70
2020-11-11	axn	NF	no factor from 2^68 to 2^69
2020-10-08	axn	NF-PM1	B1=30000000, B2=600000000, E=12
2018-11-26	TJAOI	NF	no factor from 2^67 to 2^68
2017-02-12	Joss	NF-PM1	B1=241228, B2=2412280, E=6
2017-01-29	Joss	NF-PM1	B1=167520
2017-01-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-12-30	Joss	NF-PM1	B1=129600
2016-12-24	Joss	NF-PM1	B1=108000
2016-10-02	Joss	NF-PM1	B1=90000, B2=3942000
2016-06-21	Joss	NF-PM1	B1=90000, B2=3285000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-10-19	ramgeis	NF	no factor from 2^65 to 2^66
2015-01-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2012-06-05	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2012-02-06	Squeeky_Squirrel	NF-PM1	B1=90000, B2=1642500, E=6
2011-06-11	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-11	Carsten Kossendey	NF-PM1	B1=20000, B2=260000
2009-03-09	S485122	NF	no factor from 2^60 to 2^61

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