2 155 291 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
22117509423453762601001	23	74.2	2020-07-17 09:13:07

ECM

Digits	B1	Curves
25	50000	98 / 280

Estimated T-Level: 21.8 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		James Bullington	F4D2CFC799C31FBE	0
Verified (Factored)	1999-02-14	Paul Kimoto	F4D2CFC799C31FBE	0
Verified (Factored)	1999-07-30	Nicolau C. Saldanha	F4D2CFC799C31FBE	1949993
Verified (Factored)	1999-08-31	Bruce Mitchell	F4D2CFC799C31FBE	1246787

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-17	M Miller	5D2E141865836364	1	2079917	5	3
Verified	2020-07-17	oodaira	5D2E141865836364	1	11574	5	3

History

Date	User	Type	Result
2020-07-17	oodaira	C-PRP	M2155291/22117509423453762601001 : 5D2E141865836364 PRP: Verified PRP without proof (not generated)
2020-07-17	M Miller	C-PRP	M2155291/22117509423453762601001 : 5D2E141865836364 PRP: Verified PRP without proof (not generated)
2020-07-17	GAN	F-ECM	Factor: 22117509423453762601001 / (ECM curve 2, B1=50000, B2=5000000, Sigma=6256944358845466)
2019-05-20	TJAOI	NF	no factor from 2^67 to 2^68
2017-12-29	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2016-11-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-09	Joss	NF-PM1	B1=360000, B2=6480000, E=12
2016-03-22	Joss	NF-PM1	B1=269604
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-22	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-22	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-01	Joss	NF-PM1	B1=149780
2013-09-08	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-24	markr	NF-PM1	B1=120000, B2=2340000, E=6
2011-01-15	Joss	NF-PM1	B1=50000
2010-12-30	Joss	NF-PM1	B1=30000
2010-11-03	Joss	NF-PM1	B1=20000
2009-01-07	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-04	Sturle Sunde	NF	no factor from 2^60 to 2^61

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