2 624 957 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
251691301883962790103951420319	30	97.7	2020-08-04 10:30:06

ECM

Digits	B1	Curves
25	50000	46 / 280

Estimated T-Level: 20.8 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Andrew Talbot Hopkinson	E7656D7CBC7C7251	0
Verified (Factored)	1999-07-04	Chris Moran	E7656D7CBC7C7251	1384016
Verified (Factored)	2018-07-08	kkmrkkblmbrbk	E7656D7CBC7C7251	655035

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-04	M Miller	3CF4A58C327B05F1	1	1046884	5	3
Verified	2020-08-04	ATH	3CF4A58C327B05F1	1	845411	5	3

History

Date	User	Type	Result
2020-08-04	ATH	C-PRP	M2624957/251691301883962790103951420319 : 3CF4A58C327B05F1 PRP: Verified PRP without proof (not generated)
2020-08-04	M Miller	C-PRP	M2624957/251691301883962790103951420319 : 3CF4A58C327B05F1 PRP: Verified PRP without proof (not generated)
2020-08-04	GAN	F-ECM	Factor: 251691301883962790103951420319 / (ECM curve 1, B1=50000, B2=5000000, Sigma=8472174247175012)
2019-10-14	masser	NF-PM1	B1=2630000, B2=26300000, E=12
2019-04-08	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-08	kkmrkkblmbrbk	C-LL	E7656D7CBC7C7251
2017-09-01	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-04-22	Joss	NF-PM1	B1=350000, B2=3500000, E=6
2016-12-26	Joss	NF-PM1	B1=214989
2016-12-24	Joss	NF-PM1	B1=179158
2016-12-23	Joss	NF-PM1	B1=149299
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-18	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-15	markr	NF	no factor from 2^61 to 2^62
2011-04-20	James Heinrich	NF-PM1	B1=175000, B2=4243750, E=6
2011-01-19	Joss	NF-PM1	B1=50000
2010-12-26	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-02-01	Sturle Sunde	NF	no factor from 2^60 to 2^61

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