2 123 461 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with both PRP and Lucas-Lehmer tests

No factors below 2⁷⁰

TF target 2⁶²

TF below 2^82 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	28765390
B2 =	30432336480

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	163 / 640

Estimated T-Level: 26.3 ⓘ

Status	Date	User	Residue	Shift
Verified		Jim Fare	CBC59B1DCF9BD517	0
Verified	1999-03-15	Aaron B	CBC59B1DCF9BD517	1418223
Verified	2018-04-04	kkmrkkblmbrbk	CBC59B1DCF9BD517	343273

Status	Date	User	Residue	Shift	Type	Base
Verified	2023-05-26	reclux	D371254A154BC502	221981	1	3
Verified	2023-07-18	LordJulius	D371254A154BC502	695765	1	3

History

Date	User	Type	Result
2024-12-14	Joss	NF-PM1	B1=28765390, B2=30432336480
2023-07-19	junkman2usa	CERT	PRP Certification CERT proof power = 7 Proof certified good
2023-07-18	LordJulius	C-PRP	D371254A154BC502 PRP proof power = 7 PRP: Verified Proof certified good
2023-05-26	reclux	C-PRP	D371254A154BC502 PRP: Verified PRP without proof (not generated)
2022-12-22	Architects Cubed	NF	no factor from 2^69 to 2^70
2022-12-15	Architects Cubed	NF-PM1	B1=5000000, B2=9896994030
2021-08-19	TJAOI	NF	no factor from 2^68 to 2^69
2019-05-06	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-04	kkmrkkblmbrbk	C-LL	CBC59B1DCF9BD517
2017-08-30	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2017-08-30	Joss	NF-PM1	B1=504000, B2=5040000, E=6
2017-08-19	Joss	NF-PM1	B1=420000, B2=4200000, E=6
2016-10-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-06-25	Joss	NF-PM1	B1=210000, B2=6090000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-10-26	omylist	NF	no factor from 2^65 to 2^66
2015-03-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-09-06	ramgeis	NF	no factor from 2^62 to 2^63
2012-04-03	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-24	James Heinrich	NF-PM1	B1=140000, B2=3045000, E=6
2011-01-11	Joss	NF-PM1	B1=50000
2011-01-01	Joss	NF-PM1	B1=30000
2009-08-03	USAFSS	NF-PM1	B1=20000, B2=265000
2009-01-03	Sturle Sunde	NF	no factor from 2^60 to 2^61

Username
Password