2 198 747 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
1866021736261269420045167	25	80.6	2020-05-10 18:25:55

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	60 / 640

Estimated T-Level: 25.5 ⓘ

TF below 2^80 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Philipp Hänggi	9A97D12509BE731A	0
Verified (Factored)	1999-03-01	Chris Purvis	9A97D12509BE731A	134992
Verified (Factored)	2018-04-15	kkmrkkblmbrbk	9A97D12509BE731A	71670

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-05-11	Christoph Zenger	9AA740A6F56953A1	1	1691556	5	3
Verified	2020-05-13	ANONYMOUS	9AA740A6F56953A1	1	1755599	5	3

History

Date	User	Type	Result
2020-05-13	ANONYMOUS	C-PRP	M2198747/1866021736261269420045167 : 9AA740A6F56953A1 PRP: Verified PRP without proof (not generated)
2020-05-11	Christoph Zenger	C-PRP	M2198747/1866021736261269420045167 : 9AA740A6F56953A1 PRP: Verified PRP without proof (not generated)
2020-05-10	daveward2005	F-ECM	Factor: 1866021736261269420045167 / (ECM curve 3, B1=50000, B2=5000000)
2019-04-01	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-15	kkmrkkblmbrbk	C-LL	9A97D12509BE731A
2018-03-27	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2016-12-02	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-05	Joss	NF-PM1	B1=583200, B2=5832000, E=6
2016-01-07	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-28	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-28	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-13	Joss	NF-PM1	B1=148382
2014-07-04	Joss	NF-PM1	B1=119191
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2011-01-10	markr	NF-PM1	B1=90000, B2=1620000, E=6
2010-11-09	Joss	NF-PM1	B1=30000
2010-11-05	Joss	NF-PM1	B1=15000
2009-01-08	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-03	Sturle Sunde	NF	no factor from 2^60 to 2^61

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