3 811 373 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
1217498977512469338431	22	70.0	2021-10-08 23:36:29

ECM

Digits	B1	Curves
25	50000	15 / 280

Estimated T-Level: 20.3 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Jeff Luebke	8193186D23D524B0	0
Verified (Factored)	2000-02-01	Wim Simons	8193186D23D524B0	104092

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-10-16	LaurV	F1D9C383EE488921	1	3136004	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
2022-03-03	Joss	NF-PM1	B1=90000
2021-10-17	curtisc	CERT	PRP Certification Proof certified good
2021-10-16	LaurV	C-PRP	M3811373/1217498977512469338431 : F1D9C383EE488921 PRP proof power = 7 PRP: Verified Proof certified good
2021-10-08	daveward2005	F-ECM	Factor: 1217498977512469338431 / (ECM curve 3, B1=50000, B2=5000000, Sigma=7893715489486287)
2020-12-28	axn	NF-PM1	B1=15000000, B2=750000000
2020-11-30	axn	NF	no factor from 2^68 to 2^69
2018-10-15	TJAOI	NF	no factor from 2^67 to 2^68
2016-11-17	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-08-13	Joss	NF-PM1	B1=222393, B2=4447860, E=6
2016-02-26	ramgeis	NF	no factor from 2^65 to 2^66
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-01-28	Joss	NF-PM1	B1=222393, B2=2223930, E=6
2015-01-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-19	Joss	NF-PM1	B1=81840
2012-02-29	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-11-04	Squeeky_Squirrel	NF-PM1	B1=65000, B2=1121250, E=6
2011-03-06	markr	NF	no factor from 2^61 to 2^62
2009-07-12	Carsten Kossendey	NF-PM1	B1=20000, B2=270000
2009-03-01	S485122	NF	no factor from 2^60 to 2^61

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