3 220 831 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
37910299398474486087399437999	29	94.9	2020-03-07 09:45:16

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)		Darren Smith	B76C87396610B0DD	0
Verified (Factored)	1999-07-04	Alexander Rockwell	B76C87396610B0DD	1217667

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-03-07	mikr	2961C10EB997F875	1	1737024	5	3
Verified	2020-03-08	Niels_Mache_Nextcloud	2961C10EB997F875	1	693367	5	3

P-1 factors

Date	Factor	B1	B2
2020-03-07	37910299398474486087399437999	4000000	150000000

History

Date	User	Type	Result
2022-01-03	Joss	NF-PM1	B1=3220831, B2=116701200
2022-01-02	Joss	NF-PM1	B1=3220831
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
2021-01-18	Joss	NF-PM1	B1=465425, B2=3220831, E=6
2020-03-08	Niels_Mache_Nextcloud	C-PRP	M3220831/37910299398474486087399437999 : 2961C10EB997F875 PRP: Verified PRP without proof (not generated)
2020-03-07	mikr	C-PRP	M3220831/37910299398474486087399437999 : 2961C10EB997F875 PRP: Verified PRP without proof (not generated)
2020-03-07	mikr	F-PM1	Factor: 37910299398474486087399437999 / (P-1, B1=4000000, B2=150000000, E=12)
2018-12-24	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-19	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-19	Joss	NF-PM1	B1=435425, B2=12936633, E=6
2015-12-15	Squeeky_Squirrel	NF-PM1	B1=155000, B2=3952500, E=6
2015-06-24	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
2014-09-29	Joss	NF-PM1	B1=99856
2014-06-09	Joss	NF-PM1	B1=79928
2013-01-03	dbaugh	NF	no factor from 2^62 to 2^63
2011-10-03	markr	NF	no factor to 2^62
2011-09-04	USAFSS	NF-PM1	B1=60000, B2=1035000, E=6
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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