3 239 947 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
7273369195761990437381785951	28	92.6	2020-05-30 18:38:00
278957119359247822881919005049	30	97.8	2020-05-30 18:38:00

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)	1998-02-12	Vassilo Walluschnig	A9FFB792295ED56D	0
Verified (Factored)	1999-09-14	Joonas Lehtinen	A9FFB792295ED56D	708339

PRP Cofactor

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-05-30	mnd9	E5A6BC7E5D2B2B33	2	689860	5	3
Verified	2020-05-30	ATH	E5A6BC7E5D2B2B33	2	1999389	5	3
Verified	2020-05-30	mikr	E5A6BC7E5D2B2B33	2	54040	5	3

P-1 factors

Date	Factor	B1	B2
2020-05-30	2028958118886053910711482131460329068314545724460606266599	4000000	150000000

History

Date	User	Type	Result
2022-08-17	Joss	NF-PM1	B1=3239947, B2=362702340
2022-01-03	Joss	NF-PM1	B1=3239947, B2=116701200
2022-01-02	Joss	NF-PM1	B1=3239947
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=430000, B2=6479894, E=6
2021-01-16	Joss	NF-PM1	B1=430000, B2=3239947, E=6
2020-05-30	mikr	C-PRP	M3239947/7273369195761990437381785951/278957119359247822881919005049 : E5A6BC7E5D2B2B33 PRP: Verified PRP without proof (not generated)
2020-05-30	ATH	C-PRP	M3239947/7273369195761990437381785951/278957119359247822881919005049 : E5A6BC7E5D2B2B33 PRP: Verified PRP without proof (not generated)
2020-05-30	mnd9	C-PRP	M3239947/7273369195761990437381785951/278957119359247822881919005049 : E5A6BC7E5D2B2B33 PRP: Verified PRP without proof (not generated)
2020-05-30	mikr	F-PM1	Factor: 2028958118886053910711482131460329068314545724460606266599 / (P-1, B1=4000000, B2=150000000, E=12)
2018-11-19	TJAOI	NF	no factor from 2^67 to 2^68
2018-08-11	Joss	NF-PM1	B1=410000, B2=4100000
2018-08-08	Joss	NF-PM1	B1=410000, B2=2460000
2018-08-08	Joss	NF-PM1	B1=410000, B2=2050000
2018-08-08	Joss	NF-PM1	B1=410000, B2=1640000
2018-08-07	Joss	NF-PM1	B1=410000, B2=1230000
2018-08-06	Joss	NF-PM1	B1=410000, B2=820000
2017-03-25	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-02-04	Joss	NF-PM1	B1=198720
2017-01-29	Joss	NF-PM1	B1=165600
2017-01-17	Squeeky_Squirrel	NF-PM1	B1=205000, B2=5842500, E=12
2017-01-11	Joss	NF-PM1	B1=138000
2015-06-24	Tha	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
2013-09-05	Squeeky_Squirrel	NF-PM1	B1=115000, B2=2587500, E=6
2012-12-30	dbaugh	NF	no factor from 2^62 to 2^63
2011-09-08	USAFSS	NF-PM1	B1=55000, B2=866250, E=6
2011-07-25	Carsten Kossendey	NF	no factor from 2^61 to 2^62
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=191250
2009-04-04	S485122	NF	no factor from 2^60 to 2^61

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