3 211 427 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
56237428345782788363377	23	75.6	2020-12-24 16:02:20

ECM

Digits	B1	Curves
25	50000	16 / 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)		Ingo Kuehlborn	01B6FFBBF3D19E72	0
Verified (Factored)	1999-06-15	Peter Slonka	01B6FFBBF3D19E72	3121637

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-12-26	mrh	3D79A7534AD13B52	1	1259140	5	3

History

Date	User	Type	Result
2022-09-07	Joss	NF-PM1	B1=1071142, B2=226749600
2022-01-24	Joss	NF-PM1	B1=1071142, B2=119912100
2021-02-22	Joss	NF	no factor from 2^66 to 2^67
2021-02-21	Joss	NF	no factor from 2^65 to 2^66
2021-01-17	Joss	NF-PM1	B1=420000, B2=3211427, E=6
2020-12-26	Ben Delo	CERT	PRP Certification Proof certified good
2020-12-26	mrh	C-PRP	M3211427/56237428345782788363377 : 3D79A7534AD13B52 PRP proof power = 7 PRP: Verified Proof certified good
2020-12-24	daveward2005	F-ECM	Factor: 56237428345782788363377 / (ECM curve 1, B1=50000, B2=5000000, Sigma=6824297509490207)
2020-01-26	mikr	NF-PM1	B1=4000000, B2=150000000, E=12
2019-01-14	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-27	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2018-07-25	Joss	NF-PM1	B1=400000, B2=2165034
2018-07-24	Joss	NF-PM1	B1=400000, B2=1044095
2017-03-17	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-11-19	Squeeky_Squirrel	NF-PM1	B1=200000, B2=5600000, E=12
2015-06-21	Tha	NF	no factor from 2^65 to 2^66
2015-02-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-09-03	Squeeky_Squirrel	NF-PM1	B1=115000, B2=2587500, E=6
2013-01-03	dbaugh	NF	no factor from 2^62 to 2^63
2011-09-25	USAFSS	NF-PM1	B1=55000, B2=852500, E=6
2011-08-26	markr	NF	no factor from 2^61 to 2^62
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=191250
2009-04-05	S485122	NF	no factor from 2^60 to 2^61

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