2 148 877 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
743024254059825331457	21	69.3	2020-07-21 20:46:33

ECM

Digits	B1	Curves
25	50000	100 / 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)		Kevin Jaget	663546FC9DD8DD5D	0
Verified (Factored)	1999-03-15	Hans Opsahl	663546FC9DD8DD5D	746330
Verified (Factored)	2018-04-08	kkmrkkblmbrbk	663546FC9DD8DD5D	1174065

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-22	James Heinrich	392AC608C9AB3C7E	1	1128304	5	3
Verified	2020-07-22	ATH	392AC608C9AB3C7E	1	423799	5	3

History

Date	User	Type	Result
2020-07-22	ATH	C-PRP	M2148877/743024254059825331457 : 392AC608C9AB3C7E PRP: Verified PRP without proof (not generated)
2020-07-22	James Heinrich	C-PRP	M2148877/743024254059825331457 : 392AC608C9AB3C7E PRP: Verified PRP without proof (not generated)
2020-07-21	GAN	F-ECM	Factor: 743024254059825331457 / (ECM curve 1, B1=50000, B2=5000000, Sigma=53706917930797)
2019-04-08	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-08	kkmrkkblmbrbk	C-LL	663546FC9DD8DD5D
2017-11-30	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2017-11-17	Joss	NF-PM1	B1=648000, B2=10955072, E=12
2017-10-04	Joss	NF-PM1	B1=540000, B2=5400000, E=6
2016-10-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-29	Joss	NF-PM1	B1=270000, B2=9959157, E=12
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
2015-03-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-09-07	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-22	James Heinrich	NF-PM1	B1=135000, B2=2666250, E=6
2011-01-13	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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